Which of the following is a property of inverse variation? . a.. two variables exhibit inverse variation if they have a constant ratio.. b.. two variables exhibit inverse variation if their products always equal the same nonzero constant.. c.. two variables exhibit inverse variation if, when one variable increases, the other variable increases.. d.. two variables exhibit inverse variation if, when one variable decreases, the other variable decreases..

Can someone me and do the problem plz so i can understand it more better

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

2/3(-6y+9x) expand each expression using the distributive property