Please help!! I'm in summer school and I can't fail

Answer: The slope of line b is -4
Step-by-step explanation:
Usually I'd use the formula [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex] to find the slope.
Remember the coordinates of the origin are (0, 0) so subtracting them means nothing and instead we will just do y/x of (2, -8)
[tex]\frac{-8}{2} =-4[/tex]
The slope is -4