Arectangle has an area of 112cm. the length and width of the rectangle are changed by a scale factor of 1.5. what is the area of the new rectangle?

You can find the constant of proportionality by finding the ratio of

I'm confused on this could anyone me and show me what i need to do to solve it.

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