What is the distance between point q and point r

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

Pls brainliest will be awarded if answer is correct

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.