Response to the following problem:
Suppose World-Link offers an international calling plan that charges $5.00 per month plus $0.35 per minute for calls outside the United States.
1. Under this plan, what is your monthly international long-distance cost if you call Europe for
a. 20 minutes?
b. 40 minutes?
c. 80 minutes?
2. Draw a graph illustrating your total cost under this plan. Label the axes, and show your costs at 20, 40, and 80 minutes.