In the xyplane, line l is perpendicular to the graph of the function f(x) = 5x  2. Line l could be the graph of which of the following functions? A.) g(x) = 5x B.) g(x) = (1/5)x C.) g(x) = x  2 D.) g(x) = (1/5)x E.) g(x) = 5x Perpendicular lines have slopes which are negative reciprocals. Slopeintercept form is y = mx + b m is the slope b is the yintercept f(x) = 5x  2 y = 5x  2 {slopeintercept form} slope = 5 {the number in front of the x} The line perpendicular to that would have a slope of 1/5. B.) g(x) = (1/5)x has a slope of 1/5  Algebra House
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