Question

9. 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 = 40x
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:

because the x is 3 hours and the y is 120 dollars, this means that the point both lines intersect on shows that the plumbers charge 120 for 3 hours of work