What do inflation rates measure? 
a. the rates at which businesses can borrow money
b. the total worth of all products produced within a country's borders
c. the speed with which general prices are rising
d. the value of one currency compared to another

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