Answer
$y=-5$
Work Step by Step
Use the slope formula $m=\frac{y^2-y^1}{x^2-x^1}$ and the point-slope form $y-y_1=m(x-x_1)$ to solve this problem.
Passing through $(-2,-5)$ and $(6,-5)$
$\frac{-5+5}{6+2}=0$
$y+5=0(x+2)$
$y+5=0$
$y=-5$