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gradient = (-2-5) / (2-1) = -7 hence y = -7x + C Since a point on the line is (1,5) 5 = -7 + C from which we have C = 12 The equation is y = 12 - 7x

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Q: A line passes through the points 2 -2 and 1 5 find the equation of the line?
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