You could change the y intercept to something less than positive eight.
Step-by-step explanation:
(21/7) = 3
(6)^2 = 36
3+3(36) = 111
The formula is,
(y [the second one] - y[the first one]) / (x [the second one] - x [the first one])
The first x=5, first y=12, second x=30, second y=72
Plug the numbers in, to get
(72-12) / (30-5)
Now just crunch it out.
(60) / (25)
=2.4
This is your answer.
Hope it helped!