Please answer correctly

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

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm

If two points are given, then exactly one line can be drawn through those two points. which geometry term does the statement represent