Part II.
 1. Tara lives in a state where there is no sales tax. She bought 7 tacos and paid with a $20 dollar bill.
 Her change was $9.50
 a. Define the variable and represent the situation with
 an equation:
 b. Solve this equation using a graph.
 c. Explain how you obtained the answer from the graph.
 lanton comnuter. She already has