Answer
y = $\frac{-20}{3}$
Work Step by Step
C(-1,-4) D(3,y) and m =$\frac{-2}{3}$
x1=-1,y1=-4,x2=3,y2=y
Using slope formula
m = $\frac{y2-y1}{x2-x1}$
$\frac{-2}{3}$= $\frac{y-(-4)}{3-(-1)}$ = $\frac{y+4}{4}$
$\frac{-2}{3}$ * 4 = y+4
y=$\frac{-8}{3}$ -4 = $\frac{-20}{3}$