What is the length of h?

h = 4.2

Step-by-step explanation:

The large triangle beginning on the left  has a height of 9. The small triangle has an unknown height of h almost in the middle of the of the base.

You can set up a proportion

9/h = 15/7                 Cross multiply

15h = 9*7                  Combine the right

15h = 63                   Divide both sides by 15

15h/15 = 63/15

h = 4.2      

the slope of the first function is -3. (3/1)

the slope of the second function is 1. (13-10/6-3).

since |-3| is greater than |1|, the function with the steepest slope is the first.