140k views
4 votes
Find the equation of the line perpendicular line displayed below that passes through the point (-3,2). Explain your process. Express your answer in point-slope form

Find the equation of the line perpendicular line displayed below that passes through-example-1

1 Answer

4 votes

9514 1404 393

Answer:

y -2 = 1/4(x +3)

Explanation:

Process: find the negative reciprocal of the slope of the line shown and put the appropriate values into the point-slope equation.

__

The slope of the given line can be found as the ratio of rise to run between the marked points.

m = rise/run = -8/2 = -4 . . . . counting grid squares

The desired line has a slope that is the opposite reciprocal of this:

m' = -1/m = -1/-4 = 1/4

The point-slope equation of a line with slope m through point (h, k) is ...

y -k = m(x -h)

Then the desired line with slope 1/4 through point (-3, 2) has equation ...

y -2 = 1/4(x +3)

User Ameet Chaubal
by
4.8k points