Question

Eric can choose Plan A or Plan B for his long distance charges. For each plan, cost (in dollars) depends on minutes used (per month) as shown below.

Answer 1

(a) Plan B, 8

• At 150 minutes, Plan B costs $20 and Plan A costs $12.

(b) 250, Plan A

• The costs are the same when the graphs intersect.
• Before 250 minutes, the graph for Plan A is lower than the graph of Plan B, meaning the graph of Plan A will cost less.