SAT Math Multiple Choice Question 42: Answer and Explanation

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Question: 42


The graph above shows y = 2x. Which of the following graphs represents y = |2x|?

  • A.
  • B.
  • C.
  • D.

Correct Answer: A


A Try plugging in some values for x and see if the graphs include that point. If x = 0, then y = 0, so (0, 0) should be a point on the graph. Unfortunately this doesn't eliminate anything. If x = 1, then y = 2, so (1, 2) should be a point on the graph. Eliminate (B), (C), and (D).

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