I need friends join my meet

Code is jjo-vwev-cdx

Which graph represents the equation y =4x

Simplify using positive exponents only.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )