The figure shows a square. The line y = mx divides the square evenly. What is m?

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[GMAT math practice question]

The figure shows a square. The line y = mx divides the square evenly. What is m?

A. 1/2
B. 1/3
C. 2/5
D. 5/6
E. 1
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=>

A line passing through the center of a square divides the square evenly.
The center of the square is (4, 2).
Then the slope is (2 - 0) / (4 - 0) = 2/4 = 1/2.

Therefore, A is the answer.
Answer: A