These equations represent different possibilities for a waiter earning $11.25 for waiting on one table for one hour. The constant is the hourly rate and the coefficient represents the fraction of the bill, b, the customers left as a tip. Which equation correctly represents the hourly rate and tip for a bill of $30.00?

A. 5.00 + 1/6b = 11.25

B. 5.25 +1/3b= 11.25

C. 5.25 + 1/5b= 11.25

D. 6.00 + 1/8b= 11.25