Proportions
Two variables y and x are proportional if the following relationship stands:
y = kx
Where k is the constant of proportionality
We are given a table with two proportional variables. To find the value of k, we substitute one of the given points in the table, for example (3 , 46.50):
46.50 = k(3)
Dividing by 3:
k = 46.50/3 = 15.50
The equation is:
y = 15.50x
Answer: $15.50 per hour (choice 2)