need help fast

Question

A plumber charges a flat rate for coming to a person’s home and then charges an hourly rate for the amount of time he spends there. The amount of money he charges is given by the function equation
C = 75 + 40t, where C is the amount he charges and t is the time he spends at a home in hours.

What is the meaning of the vertical intercept in this equation?

A.
The plumber charges $40/h.

B.
The plumber charges $75/h.

C.
The plumber charges a flat rate of $40.

D.
The plumber charges a flat rate of $75.

Answer 1

C = 75 + 40t            In slope intercept form

C = 40t + 75            75 is the intercept

 

D.