Find the equation of the line specified.The line passes through the points ( 2, 1) and ( 5, 4)

The slope through (2, 1) and (5, 4) is (4 − 1)/(5 − 2) = 1. Using y = mx + b and the point (2, 1), we get 1 = 2 + b, so b = −1. The equation is y = x − 1, choice C.

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