Question

What is the slope between 5,12 and 30,72

Answer 1

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!