What type of function models the context James folds a piece of paper in half several times

How do i do this activity, is appreciated

Graph the linear function using the slooe and y intercept

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.