Craig has a job waiting tables where he earns $3.15 per hour plus tips. Craig earned $79.48 in tips during his shift yesterday.

If x represents the number of hours Craig worked yesterday, which of the following equations can be used to find the amount of money Craig earned yesterday?

A.
y = 3.15x + 79.48
B.
y = 79.48x + 3.15
C.
y = 79.48x - 3.15
D.
y = 3.15x - 79.48