Answer :

I can't think of what the form is called, but the slope is in that equation.

y=mx+b

m is the slope and in that equation, m=-4/3

[tex]y= \frac{-4}{3} x-1[/tex]
slope intercept form:  y=mx+b
y=y
 [tex] \frac{-4}{3}x[/tex]=mx  
-1=b
 mx=slope
 slope=   [tex] \frac{-4}{3} [/tex]x