Line GH passes through points (2, 5) and (6, 9). Which equation represents line GH?

The slope through (2, 5) and (6, 9) is (9 − 5) ÷ (6 − 2) = 1. So the line has the form y = x + b. Substituting (2, 5) gives 5 = 2 + b, so b = 3. The equation is y = x + 3, choice A.

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