Weekly cost: The weekly cost of running a small firm is a function of the number of employees. Every week there is a fixed cost of $2500, and each employee costs the firm $350. For example, if there...

Weekly cost: The weekly cost of running a small firm is a function of the number of employees. Every week there is a fixed cost of $2500, and each employee costs the firm $350. For example, if there are 10 employees, then the weekly cost is 2500 + 350 × 10 = 6000 dollars.

a. What is the weekly cost if there are 3 employees?

 b. Find a formula for the weekly cost as a function of the number of employees. (You need to choose variable and function names. Be sure to state the units.)

 c. Make a graph of the weekly cost as a function of the number of employees. Include values of the variable up to 10 employees. d. For what number of employees will the weekly cost be $4250?