Line CD passes through points (0, 2) and (4, 6). Which equation represents line CD?

The slope through (0, 2) and (4, 6) is (6 − 2) ÷ (4 − 0) = 1. Since the line passes through (0, 2), its y-intercept is 2. Therefore, the equation is y = x + 2, choice C.

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