Please help me

Question

find the slope of a line that is perpindicular to the line to the line containing the points -2, -1 and 2, -3.

m = -2
m = 2
m= -1/2
m = -1

I think it is a, but I have no idea

Answer 1

first, find the slope of the line, then take the negative reciprocal.

slopw of line; m=&y1-y2)/(x1-x2)=(-1--3)/(-2-2)=2/-4= -1/2

what is the negative of the reciprocal of that?

Answer 2

-2/1?

Answer 3

Nope, take the reciprocal of -1/2, then multiply it by -1

Answer 4

of course.

Answer 5

so it is m = 2?