The local Farmers Market sells peppers at five for $2.25. Complete the rate table.

Number of Peppers
0
1
2
3
4
5
10
15
20
Cost ($)

0
0.45
0.90
1.35
1.8
$2.25
4.5
6.75
9 What is the constant rate of change (CROC)? How do you know?
Is this a proportional relationship? How do you know?