Gregg K. answered • 12/05/16

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#mathtutor AP Calculus & AP Statistics Teacher / College Teacher

Since the slope of the given line is -2 the slope we need for the perpendicular line is 1/2

Therefore, our line is y = 1/2x + b All we need now is the y-intercept

plug the point (2, -1) into the equation for x and y

-1 = 1/2(2) + b

-1 = 1 + b

-2 = b

ANSWER: y = 1/2x -2