1: In his job as a cashier, Joe makes $500 each month plus $20 every time he convinces a customer to open a charge account at the store.

a. write the equation that describes Joe’s monthly income I as a function of n, the number of accounts that Joe solicits. Name the form of equation you wrote and why you chose to use that form.

b. This function is:
linear
exponential

c. This function is:
continuous
discrete