Greg is buying a bike on a payment plan. The equation y=20x+600 models the amount he has left to pay, where x is the number of weeks and y is the amount of money owed in dollars. Lin is also buying a bike on a payment plan. The bike costs $500. She will pay $25 each week. Which statement correctly compares Greg's function and Lin's function? A. Lin's bike cost less than Greg's bike. B. Lin's bike will be payed off after Greg's bike. C. Lin is paying less money each week for her bike. D. Lin will have more left to pay than Greg after 10 weeks.​