Paul the plumber charges $25 for a service call. He then charges $100 an hour. Write a linear equation to model this situation.

The correct linear equation to model the situation is:

y = 100x + 25

### Explanation:

– y represents the total charge.

– x represents the number of hours Paul works.

– The $25 for the service call is a one-time fee (the y-intercept), and $100 per hour is the variable charge (the slope).

So, for any number of hours x, you add the one-time service charge of $25, resulting in the equation (y = 100x + 25).

If you have more questions or need further assistance, don’t hesitate to ask!