SAT Command of Evidence - Quantitative

Command of Evidence (quantitative) gives a graph or table and asks which choice uses the data to complete or support a claim. The answer requires reading the relationship the claim describes — usually a comparison — rather than quoting a single endpoint.

Practise this skill freeHow the SAT is structured
Reading and WritingInformation and Ideas156 questions
The trap on this skill

Using an endpoint or starting value instead of comparing the change in both groups.

How this skill behaves

What 156 questions on it look like

100% of these questions can appear in the harder second module. On a section-adaptive test that matters: this is a skill that keeps mattering after a strong first module, not one you leave behind.

50% of the bank for this skill is rated hard, so it rewards practice past the point where the basic form feels comfortable.

hard50%
medium50%

Difficulty mix across the 156 questions in this skill.

From the bank

Three real command of evidence - quantitative questions

Each one explains the credited answer and why every other option fails.

Information and Ideas · hard

Which choice most directly strengthens the claim?

  1. AThe tested group ended at 78%, which was 26 percentage points above the comparison group's ending rate.
  2. BThe tested group improved by 17 percentage points, while the comparison group improved by only 6 percentage points.correct
  3. CThe comparison group improved by 6 percentage points, showing that both groups changed during the study.
  4. DThe tested group began at 61%, which was 15 percentage points above the comparison group's starting rate.
Why B is correct — and why the others are not

The tested group improved by 17 points, which is greater than the comparison group's 6-point improvement. This matches the evidence or condition involving community workshops from the indoor set. A final check is making the answer explain the stated case, not a broader rule.

A. This compares endpoints, not the size of the improvements.

C. This notes change in both groups but does not show that the tested group's improvement was larger.

D. The starting gap does not establish which group improved more.

Information and Ideas · medium

Which choice provides the best evidence for the claim?

  1. AThe tested group ended at 56%, which was 12 percentage points above the comparison group's ending rate.
  2. BThe comparison group improved by 3 percentage points, showing that both groups changed during the study.
  3. CThe tested group improved by 12 percentage points, while the comparison group improved by only 3 percentage points.correct
  4. DThe tested group began at 44%, which was 3 percentage points above the comparison group's starting rate.
Why C is correct — and why the others are not

The tested group improved by 12 points, which is greater than the comparison group's 3-point improvement. The final step answers the prompt as it applies to kelp beds from the larger group. A final check is checking the comparison the data actually make.

A. This compares endpoints, not the size of the improvements.

B. This notes change in both groups but does not show that the tested group's improvement was larger.

D. The starting gap does not establish which group improved more.

Information and Ideas · hard

Which finding, if true, would most directly support the claim?

  1. AThe tested group ended at 63%, which was 23 percentage points above the comparison group's ending rate.
  2. BThe comparison group improved by 4 percentage points, showing that both groups changed during the study.
  3. CThe tested group began at 50%, which was 14 percentage points above the comparison group's starting rate.
  4. DThe tested group improved by 13 percentage points, while the comparison group improved by only 4 percentage points.correct
Why D is correct — and why the others are not

The tested group improved by 13 points, which is greater than the comparison group's 4-point improvement. The key support is the way the item treats streetcar maps from the older records. A final check is rejecting a true but off-purpose detail.

A. This compares endpoints, not the size of the improvements.

B. This notes change in both groups but does not show that the tested group's improvement was larger.

C. The starting gap does not establish which group improved more.

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FAQ

Command of Evidence - Quantitative questions

How do I read SAT data questions?

Identify what the claim compares, then find that comparison in the figure. A number that appears in the graph is not evidence unless it addresses the claim.

Do I need to calculate anything?

Rarely. These questions test reading a figure accurately against a claim, not arithmetic.
Last reviewed 2026-08-28. Format and scoring facts sourced to College Board. Question counts describe the PrepScore bank, not the exam.
Same domain
Central Ideas and Details312 questionsCommand of Evidence - Textual312 questionsInferences156 questions

Practise command of evidence - quantitative until the trap stops working.

Real Digital SAT questions, the reasoning on every option, and a mistake bank that only clears when you get it right.

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