find y if the line through (5,2) and (-3,y) has a slope m= -11/8.

Substituting these values, we have
[tex]\begin{gathered} -\frac{11}{8}=\text{ }\frac{y-2}{-3-5} \\ \\ -\frac{11}{8}=\frac{y-2}{-8} \\ 8(y-2)=\text{ -8 x -11} \\ 8y-16=88 \\ 8y=88+16 \\ 8y=104 \\ y=\frac{104}{8} \\ y=13 \end{gathered}[/tex]