The graph shows the cost for each topping on a pizza and how much it cost. What does the rate of change represent in the situation?
Total cost (y)
15
14
13
194
11
10+
9
7
6
5
4
3-
2
+Toppings (3)
1 2 3 4 5 6 7 8
With no toppings a pizza costs $6
Each topping costs $1
With no toppinga a pizza costs $14
O
Each topping costs $6