13. Belle is buying pizzas for her daughter's birthday party, using the prices in the table. Which
equation best describes the relationship between the total cost c and the number of pizzas p?
Pizzas
Total Cost ($)
5
26.25
10
52.50
15
78.75
a) c = 26.25p
c) c = 5.25p
b) c = p + 26.25
d) c = 6p - 3.75