3. A plumber charges [tex]$35 fee for a service call plus $[/tex]60 per hour of service.
A) Write and graph an equation representing the cost, y, of the plumber working x hours.
B) What will be the total cost, y, for 8 hours of work?
C) How many hours would the plumber have worked if he made $275?
4. Suppose that the water level of a river is 25 feet and that it is rising at a rate of
0.5 foot per day.
A) Write & Graph an equation for the water level, y, after x days.
B) What will the water level be in 7 days?
C) In how many days will the water level be 32 feet?