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Points exactly 3 units from the x-axis lie on
Ay = 3 and y = -3
Bx = 3 and x = -3
Cy = 3x + 3
Dy = 9 and y = -9
Answer & Solution
Correct answer: A. y = 3 and y = -3
Distance from the x-axis is |y|, so |y| = 3 gives the two lines y = 3 and y = -3.
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