The Fun Center charges $15 for the first hour of activities and $3 for each additional hour up to five hours of fun.

Question

Create an equation or graph 

Answer 1

f(t) = 15 + 3t  gives f, the cost of t hours of fun.  t can be any positive number not exceeding 5.

 

Should you desire to graph this, it's a straight line segment (because of limited 'domain').