Mr. Nelson went to the Taste of Tacos, a festival where people come from all over to taste a variety of...

1. Mr. Nelson went to the Taste of Tacos, a festival where people come from all over to taste a variety of tacos. Mr. Nelson spent $45 total for the 12 tacos he ate at the festival. The cost for each taco was $2.50.
a. How much would someone spend at the festival if they ate 4 tacos?
b. What could the y-intercept represent in this situation?