SAT Math Multiple Choice Practice Question 92: Answer and Explanation

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Question: 92


PQRS is a parallelogram, three of whose coordinates are shown. The coordinates of point Q must be

A. (a + n, b)
B. (a + 2n, b)
C. (c + n, b)
D. (c - n, b)
E. (c - 2n, b)

Correct Answer: D


D. To get from point S to point P, you have to move n spaces to the left, so the same must be true to get from R to Q. That fact tells you that the x-coordinate of Q must be c - n.

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