SAT Math Multiple Choice Practice Question 503: Answer and Explanation
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Question: 503
2. 
The graph above shows y = 2x. Which of the following graphs represents y = |2x|?
A. 
B. 
C. 
D. 
E. 
Correct Answer: B
Explanation:
B 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 A, C, D, and E.