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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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