Question

Write the equation of a line that is perpendicular to the line y= (-1/5)x + 2 and has a y-intercept that is 5 units larger that the y-intercept of y= (-1/5)x + 2.

a. y= -5x + 7
b. y= 5x + 7
c. y= (-1/5)x + 7
d. y= (1/5)x + 7

Answer 1

To find the perpendicular line slope , you multiply the current slope by -1 and then find the reciprocal of that. That means that you multiply -1/5 by -1 which is 1/5, and the reciprocal  of that is 5, so the slope is 5 and the answer is B