Killian M. answered • 06/18/15

Tutoring From Math to Accounting, Public Speaking to Writing

To find a perpendicular line you have to find the negative reciprocal of the original slope. The equation is not in y=mx+b form so it is easiest if you convert it to:

y=2/3-2x. From this you can see that the negative reciprocal is 1/2. Now you have two points given to you that you can plug in to find the b in your mx+b equation. The -2 goes in for the x and the 4 goes in for the y. This gives you:

4=(-2)*1/2+b or b=5.

This means your final equation equals y=1/2x+5