Help as soon as possible please

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Graph the equationy= x+3[tex]y = x + 3[/tex]

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.