Question

A plumber charges $110 per hour. If h represents the number of hours that he works, which domain values are relevant on a graph that shows his earnings?

Answer 1

h ≥ 0 is the domain.

Explanation:

The plumber charges $110 per hour.

If h represents the number of hours that he works, then the equation of his earning will be a function h and given by

E = 110h ...... (1)

Here, h is the independent variable and E is the dependent variable.

So, the domain of this function means the possible values of h.

Now, it is evident that h ≥ 0 and h can not be negative.

So, the domain value of h ≥ 0 is relevant to the graph that shows his earning. (Answer)