Please help A music teacher needs to buy guitar strings for her class. At store A, the guitar strings cost $6 each. At store B, the guitar strings are $20 for a pack of 4.

A. Use the pen tool to make graphs that show the income each store receives if the teacher needs 1–20 guitar strings.

B. Describe the shape of the graph for store A. Describe the shape of the graph for store B. Why are the graphs different?

Enter your answer.

C. Communicate Precisely Compare the graphs for stores A and B. For what numbers of guitar strings is it cheaper to buy from store B? Explain how you know.