If you can give me more information on this I could help you a bit more respond.
Answer:
-9/8
Step-by-step explanation:
The two points given are
(1,6) and (9,-3)
The slope is given by
m = (y2-y1)/(x2-x1)
= (-3-6)/(9-1)
= -9/8
$30 because 12/6 = 2 so 15 x 2 = 30
