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point A = (x1,y1) = (-3,3) point B = (x2,y2) = (1,4)

slope of AB = y2-y1/x2-x1 = (4-3)/(1-(-3)) = 1/4

Slope of a line perpendicular to AB is the negative reciprocal of slope of AB

slope of AB = 1/4 Negative reciprocal of that is -4

Slope of YZ = y-7/(-2+4) = (y-7)/2

(y-7)/2 = -4

solve for y

y -7 = -8

y = -1 choice A

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