American Diploma · ACT · Reading: Integration of Knowledge and Ideas

Passages with Charts, Tables and Graphs

How to read a table, chart or graph fast on ACT Reading, match the passage's claims to the data, and answer questions that combine the text with the visual without over-reading the numbers.

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What this question type tests

Some ACT Reading passages come with a table, chart or graph. Every ACT form has either a passage with charts or graphs or a paired-passage set, so you must be ready for both. The questions about the visual belong to Integration of Knowledge and Ideas, which is 19–26% of the scored ACT Reading questions. The passage still has 9 questions: several ask about the text alone, and the rest ask you to read the visual or to combine the visual with the text.

This is not a maths test. The arithmetic is simple (a difference, a comparison, sometimes a percentage). What the questions really test is careful reading: the right row, the right column, the right unit, and a conclusion that does not go further than the data.

Question kind	What it asks	Typical stems (in our own words)
Read the visual	Find or compare values	"According to the table, which … had the highest …?" / "By how many … did X exceed Y?"
Visual → text	Which statement in the passage the data support	"The data in the table most directly support which statement from the passage?"
Text → visual	Which part of the data matches something the passage describes	"Which pattern in the graph is most consistent with the author's claim in paragraph 3?"
Apply / predict	Use the passage's rule and the data on a new case	"Suppose that … Based on the passage, the value would most likely be:"
Limits of data	What the data cannot show	"The fact that the data come from one season most directly suggests that:"

Step 1: Read the visual fast (20 seconds)

Do not study every number before the questions. Read the frame of the visual, so that you know where things are. The questions will tell you which numbers you need.

Title: what is measured, where and when ("one week in June," "one nesting season"). The time and place limit every conclusion.
Column headings (table) or axis labels (graph): what each number means.
Units: °C, %, millions, per hour, per 1,000 people. Most data mistakes are unit mistakes.
One quick pattern: as one column goes up, what does another do? Which row is the highest or lowest? Say it in five words: "hotter → more females, fewer hatch."
Link to the text: which paragraph explains the visual? Usually the paragraph that describes the method or says "the table shows."

Visual	Read first	Watch out for
Table	Title, column headings, units in brackets	Reading across the wrong row; using the wrong column
Bar chart	Axis label and scale; the legend if there are two colours	Bars that start above zero look more different than they are
Line graph	What is on the horizontal axis (usually time) and the vertical axis	A rise followed by a fall is not a "steady increase"
Scatter plot	Both axes; the general direction of the dots	A trend (correlation) is not proof that one thing causes the other

Word / phrase	Meaning / use
increase / rise / grow	the value goes up
decrease / fall / decline / drop	the value goes down
peak	the highest point before a fall
remain stable / level off	the value stays about the same
trend	the general direction of the data over time or across rows
exceed	be greater than ("52 exceeds 27 by 25")
percentage points	the simple difference between two percentages (96% − 57% = 39 percentage points)
correlation	two things change together; it does NOT prove that one causes the other

اقرا الجدول صح

قبل ما تبص على الأرقام اقرا العنوان، وعناوين الأعمدة، والوحدة (درجة مئوية؟ نسبة مئوية؟ مليون؟). أغلب الغلط في أسئلة الجداول بيكون عمود غلط أو صف غلط أو وحدة غلط. حط صباعك على الخانة بالظبط قبل ما تحسب.

Step 2: Match claims to data

The most important question type here asks which statement the data support. A statement is supported only if the visual actually contains numbers that show it. Use these rules.

Rule 1 — The data must show the claim, not just be about the same topic.

✓ Table: surface temperatures from 27 to 52 °C, air temperatures from 31 to 37 °C. Claim: "The surfaces differed far more than the air above them." — The numbers show it.
✗ Claim: "Dark surfaces release stored heat slowly." — Same topic, but one 2 p.m. reading cannot show how fast heat is released.

Rule 2 — Data show WHAT happened, not WHY. An explanation (a cause, a mechanism) or a recommendation ("the school should plant trees") is never shown by numbers alone.

✓ "The shaded lawn was the coolest surface measured."
✗ "Trees cool the ground by evaporating water." — A mechanism the table does not measure.

Rule 3 — Check both halves. When a choice combines the text and the data, the statement must be in the passage AND the numbers must agree with it.

✓ "As the passage says, warmer nests produced more females: 96% at 31.6 °C vs 57% at 29.3 °C."
✗ "As the passage says, warmer nests produced more males." — The numbers are real, but the claim is reversed.

Rule 4 — Do not go beyond the data. One week, one place, one group or one season cannot prove "always," "everywhere" or "in every season."

✓ "In that week in June, the asphalt was the hottest surface measured."
✗ "Asphalt is the hottest surface in every season and at every hour." — Too extreme for one week at 2 p.m.

Rule 5 — Numbers and percentages are different. A bigger number can be a smaller share, and a "percentage-point" difference is a simple subtraction of two percentages. Calculate on paper; do not guess.

✓ 270 of 1,800 visitors = 15%; 120 of 600 visitors = 20%. The first group is larger, but its share is smaller.
✗ "Because 270 is more than 120, first-time visitors made up a larger share on the free day."

Worked examples

Short excerpt (shorter than a real ACT passage): A school science club measured four surfaces in its schoolyard at 2 p.m. every day for one week in June, using an infrared thermometer for the surface and an ordinary thermometer held 1.5 metres above the ground for the air. The club noted that the surfaces differed enormously but the air above them differed much less, because moving air mixes heat from many places. The shaded lawn was the coolest place both at ground level and at head height, and the club now argues that the school should plant more trees near the car park.

Average temperatures at 2 p.m. (one week in June) Surface | Surface temperature (°C) | Air temperature at 1.5 m (°C) Black asphalt, full sun | 52 | 37 Light concrete, full sun | 41 | 36 Lawn, full sun | 33 | 34 Lawn, shaded by trees | 27 | 31

Worked example 1 — reading the right column

Question: According to the table, by how many degrees did the average surface temperature of the black asphalt exceed that of the shaded lawn?

A) 6 °C
B) 11 °C
C) 19 °C
D) 25 °C

Answer: D. Surface column: 52 − 27 = 25.

A is wrong — Wrong column: 37 − 31 = 6 is the difference in AIR temperature.
B is wrong — Wrong row: 52 − 41 = 11 compares asphalt with concrete.
C is wrong — Wrong row: 52 − 33 = 19 compares asphalt with the sunny lawn.

Worked example 2 — which statement do the data support?

Question: The data in the table most directly support which statement from the excerpt?

A) The surfaces differed enormously, but the air above them differed much less.
B) Moving air mixes heat from many places.
C) The school should plant more trees near the car park.
D) The club used an infrared thermometer to measure the surfaces.

Answer: A. Surface temperatures range over 25 degrees (27–52); air temperatures range over only 6 (31–37). The numbers show exactly this claim.

B is wrong — An explanation (WHY the air differs less). The table shows the difference, not its cause — Rule 2.
C is wrong — A recommendation. Data cannot by themselves show what anyone should do.
D is wrong — True, but it is about the method; the numbers in the table do not show which instrument was used.

Worked example 3 — a fact from the visual

Question: Based on the table, which surfaces had a surface temperature LOWER than the air temperature 1.5 metres above them?

A) Black asphalt only
B) Light concrete only
C) Both lawns
D) None of the four surfaces

Answer: C. Sunny lawn: 33 < 34. Shaded lawn: 27 < 31. Both lawns were cooler than the air above them.

A is wrong — Reversed: asphalt was much hotter than the air (52 > 37).
B is wrong — Reversed: concrete was hotter than the air (41 > 36).
D is wrong — Contradicted by the two lawn rows.

Worked example 4 — the limits of the data

Question: The club's teacher points out that all the measurements were taken in one schoolyard, at one time of day, during a single week in June. This limitation most directly weakens which claim?

A) At 2 p.m. in that week, the shaded lawn was cooler than the asphalt.
B) The black asphalt was the hottest surface the club measured.
C) The club measured the air 1.5 metres above the ground.
D) The same pattern of differences would be found in every season and at every hour.

Answer: D. One week, one place and one hour cannot show what happens in winter or at night. Only D goes beyond what was measured (Rule 4).

A is wrong — This is exactly what was measured, so the limitation does not weaken it.
B is wrong — Also exactly what was measured.
C is wrong — A description of the method, not a conclusion.

Classic traps

Wrong column. The choice uses a real number from the table, but from the column next to the one asked about.
Wrong row. The right column, but a neighbouring row. Put a finger on the row name every time.
Units. Degrees vs percentages, thousands vs millions, per day vs per week.
Numbers vs shares. A larger number can be a smaller percentage of the total.
Explanation or recommendation dressed as data. "Because …" and "should …" are never shown by numbers alone.
Over-reaching. One season, one place or one group cannot prove "always" or "everywhere."
Reversed trend. Read the direction carefully: as X rises, does Y rise or fall?

Fast strategy for test day

Before the questions: title → headings → units → one-sentence pattern (20 seconds).
Pure table questions are fast points: do them early.
For each number question, write the subtraction or division on paper.
For "support" questions, ask: do the numbers SHOW this, or is it only on the same topic?
For "limit" questions, look for the choice that goes beyond the time, place or group measured.
Keep to about 10 minutes for the passage and its 9 questions.

الأرقام بتقول «إيه» مش «ليه»

الجدول بيوريك اللي حصل بس، مش سبب اللي حصل، ومش لازم نعمل إيه. فلو الاختيار فيه «because» أو «should» غالبًا الجدول لوحده مش بيثبته. وكمان خلي بالك: بيانات أسبوع واحد أو مكان واحد متثبتش «دايمًا» أو «في كل مكان».

Practice

A natural-science passage of about 650 words with a data table and 9 questions, as on the real test. It is untimed, but aim for about 10 minutes. Read the table's title, headings and units before you answer.

Remember

Every ACT form has either a passage with charts or graphs or a paired-passage set.
Read the frame first: title, headings or axis labels, units, one pattern.
A supported statement is one the numbers actually SHOW — not a cause, not a recommendation.
Check the column, the row and the unit before every calculation; numbers and percentages are different.
Data from one time, place or group cannot prove "always" or "everywhere."

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