I think it's the second equation. I could be wrong but I think that's what it is
The slope is 1/4, you find slope by doing rise over run, so you count up 1 and over 4 and youre at the second point, therefore its 1/4
You want to order pizzas for a party you're having. You want them delivered to your house. Each pizza is twenty dollars, plus a one-time delivery fee of five dollars. If you wanted to buy ____ pizzas, how much would you have to pay?
21,250 - 20,000 = 1,250
1,250 is the elevation at witch the plane took of.