Answer:
b. [tex]\frac{13}{6}[/tex]
Step-by-step explanation:
(15, 3) (9, -10)
[tex]\frac{y2 - y1}{x2 - x1}[/tex]
[tex]\frac{-10 + -3}{9 - 15}[/tex]= [tex]\frac{-13}{-6}[/tex] = [tex]\frac{13}{6}[/tex]
