Every week Marcela deposits $45 in a bank account that she opened with an initial deposit of $250, so that after n weeks her balance (in dollars) is 250+45n. Her brother Ronnie withdraws $30 each week from his own bank account, which he opened with an initial deposit of $145, so that after n weeks his balance is 145-30n. Express the ratio of Marcela's balance to ronnie's as a rational function, and simplify

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