Emma earns 120 frequent flyer miles for every $40 of merchandise she buys with her credit card. Which of the following equations could be used to graph this function?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?