David is running a concession stand at a soccer game. He sells nachos and sodas. Nachos cost $2.50 each and sodas cost $1.50each. At the end of the game, David made a total of $120 and sold a total of 72 nachos and sodas combined. Which system of equations represents this situation? (x value represents nachos and y value represents sodas) (12, 60)

(57, 15)

(61, 26)

(15, 57)

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the