A line passes through the points K(2a,3b) and R(a,-b). What is the slope?

Question

a.)4b/a
b.)4ab
c.)4a/b

Answer 1

(change in y)/(change in x)
=(3b-(-b))/(2a-a)
= ?

Answer 2

so would the correct answer be
a.) 4b/a

Answer 3

Yes

Answer 4

Thank you both:)