A plumber charges $45 per hour, h, to install a new bathtub, plus the price of the bathtub.
Part A
22. The function P(h) = 45h+275 represents the total cost of the installation and the bathtub.
What is the meaning of the y-intercept of the function in this context?
A The point (0,275) represents the price of the bathtub with 0 hours of installation.
B The point (45, 275) represents the price of the bathtub with 45 hours of installation.
C The point (275,0) represents the price of the bathtub with 0 hours of installation.
The point (275,45) represents the price of the bathtub with 45 hours of installation
D
Part B
23. The plumber decides to adjust the amount of the hourly rate, R, each year, x. The equation
R(x) = 45(1.1)* represents the hourly rate after x years.
What does 1. 1 represent?
B
A The plumber will decrease the amount of the hourly rate by 10% each year.
The plumber will decrease the amount of the hourly rate by 110% each year.
C The plumber will increase the amount of the hourly rate by 10% each year,
The plumber will increase the amount of the hourly rate by 110% each year.
D