You're a plumber, and you'll charge a certain amount just for showing up at a job, and you'll also charge a certain rate per hour of work (billed in half-hour increments). Materials are a separate charge not
considered in this problem.
If you charge $326 to show up at a job and work three hours, and you charge $548.50 to show up at a job
and work five and a half hours, then what is your charge just to show up at a job? What is your per-hour
• charge? Write a linear function that expresses the amount you bill to show up and perform a job as a
function of the number of hours worked. How much will you charge to show up at a job and work for four
hours?