Acar manufacturer wants to change the content of a certain automobile to have less steel in order to get better gas mileage. one hundred standard cars and 100 cars of the new content are built and test driven across country to determine the overall gas mileage. this study is an

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