In 2005, the Shabelle River in Somalia rose an estimated 5.25 inches every hour for 15 hours. The increase in water level is represented by the function f (x) = 5.25x, where x is the number of hours. Graph the function and give its domain and range.

3 6 9 12 15. These numbers will be your domain and also what you plug in for x because it fits on the graph.

so your equation for all of these would be this:

f (x) = 5.25 (x)

so

f (3) = 5.25 (3)

15.75

f (6) = 5.25 (6)

31.5

f (9) = 5.25 (9)

47.25

f (12) = 5.25 (12)

63

f (15) = 5.25 (15)

3.75