Respuesta :

the slope formula is m = (y2-y1) / (x2-x1)
The difference between y is 9-0=9
The difference between the x is -3-8=-11
the answer is a
make sure you do y2-y1 and x2-x1 or y1-y2 and x1-x2, but dont do y1-y2 and then x2-x1. They should match up.