SAT Reading & Writing · Command of Evidence (quantitative)
A scientist tested material strength after two treatments at two temperatures.
A scientist tested material strength after two treatments at two temperatures.
| Treatment | 20 C strength | 60 C strength |
|---|---|---|
| P | 112 MPa | 89 MPa |
| Q | 105 MPa | 101 MPa |
Which choice most effectively supports the claim that Treatment Q better preserved strength as temperature increased?
| Treatment | 20 C strength | 60 C strength |
|---|---|---|
| P | 112 MPa | 89 MPa |
| Q | 105 MPa | 101 MPa |
Which choice most effectively supports the claim that Treatment Q better preserved strength as temperature increased?
Answer and explanation
Answer: A: Q decreased by only 4 MPa, whereas P decreased by 23 MPa.
The claim is about which treatment better preserved strength as temperature rose, and A supplies the direct comparison needed: each treatment's actual loss in strength. B and C each report a single data point in isolation, without the comparison the claim requires. D is true of both treatments but doesn't address which one preserved strength better as conditions changed.
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