Answer:
-2/3
Step-by-step explanation:
The slope of a line perpendicular to one with a slope of 3/2 will have a slope that is the negative reciprocal of that:
red slope = -1/(3/2) = -2/3
(o, -2) is the correct answer because in -90°
P [x,y] =P' [y,-x ]
hope it is helpful to you