The price of a community pool membership has a one-time sign-up fee and a monthly fee. The price can be modeled by the function y = 20x + 50, where x is the number of months.
What is the slope, and what does it represent? (1 point)
1. 20; it represents the monthly fee
2. 20; it represents the one-time sign-up fee
3.50; it represents the monthly fee
4. 50; it represents the one-time sign-up fee