A local pizza shop has a membership program for frequent buyers. The membership costs $20 per month and members get a discounted price of $1.75 per slice of pizza. Robert purchased a membership to this pizza shop. How much would Robert have to pay the pizza shop if he bought 6 slices of pizza this month? What would be the monthly cost for x slices of pizza?
Monthly cost with 6 slices:
Monthly cost with x slices: