Victora recently switched to a new electric company. If she uses 0 and 400 kilowatt- hours (kWh) of electricity per month, the cost is a set price of $30. if she uses 400 kWh or more per month, the price is $0.097 per kWh

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