18. One bank charges $1.50 for each use of its debit card. Another bank charges $10 per month for an
unlimited number of debit card uses.
A. Write an equation to model the cost of using your
debit card for one month with each bank.
Bank 1:
Bank 2:
C. How many times per month would you need to use
your debit card to make the bank that charges a flat
rate the better choice. Explain.
B. Graph both equations you wrote in Part A on same
graph.