Question

The equations below represent the total amount charged, y, by two different plumbers as a function of the number of hours worked, X

Plumber A: y = 20x + 60
Plumber B: y = 40%
The graphs of these functions cross at the point (3, 120). What does the point (3,120) signify?

Answer 1

both plumbers charge $120 for 3 hours of work

Explanation:

1) x=3 and x stands for hours.

2) 120=y and y stands for money charged

so the points (3, 120) show that the plumbers both charge 120 for 3 hrs.