Eunice buys dog bed with a listed price of $31. Eunice uses a sale that provides 30% off. What is the total final price Eunice pays?

A. $21.70
B. $23.70
C. $25.55
D. $28.10

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