ROBIN PURCHASED AN OLD CAR FOR RS.73500 . HE SPENT RS 10300 ON REPAIRS AND PAID RS 2600 FOR IT'S INSURANCE . THEN HE SOLD IT TO A MECHANIC FOR RS 84240 .. WHAT WAS HIS PERCENTAGE GAIN OR LOSS ?

Just tell me how to set up the equation.

Find the slope of the line passing through a pair of points

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