What is the equation of the line that passes through the points (2, 6) and (4, 10)?
a) y = 2x + 4
b) y = 2x - 2
c) y = 2x - 4
d) y = 2x + 2

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?