Fill in the table to show a proportional relationship and then identify the constant of proportionality for the cost to the number of yoga classes. In the answer box, please list the constant of proportionality

Answer:
30 = 2
60 = 4
90 = 6
120 = 8
Step-by-step explanation:
60/4 = 15
15 = 1
30 = 2
45 = 3
60 = 4
75 = 5
90 = 6
105 = 7
120 = 8