Verified Answer :

Slope is 4.5. equation is m=(y1-y2)/(x1-x2)

slope=(y2-y1)/(x2-x1) when given the oints (x1,y1) and (x2,y2)
we are given
(6,8) and (3,12)
x1=6
y1=8
x2=3
y2=12

slope=(12-8)/(3-6)=4/-3=-4/3

slope=-4/3 aka -1 and 1/3

-4/3 is slope