Question

The equation of a line is y= -1/2x - 1 What is the equation of the line that is perpendicular to the first line and passes through the point (2, –5)?

Answer 1

y=2x-9 or D

Explanation:

To get the slope of the perpendicular line, you find the negative reciprocal. The negative reciprocal of -1/2 is 2.

Then, you need to find the y-intercept. Considering the line has to pass through the point (2,-5), you can use the slope to find that the y-intercept is -9.