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Choose the equation of the line passing through the point (-1, 7)and perpendicular to y = -1/4x - 5 y = -4x - 3 y = -4x - 11 y = 4x + 3 y = 4x + 11
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the perpendicular line has an gradient of m = 4 this is the negative reciprocal of the given line. then the equation is in the form y = 4x + b substitute x = -1 and y = 7 to find the value of b, the y- intercept.
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