Answer:
y=8.99+3
Explanation:
we will make
x=how many large pizzas are sold
and a flat fee of $3 because they did delivery and do not pick it up them selves
so it would look like this
y=8.99x+3 to find the total cost
and it's not
y=8.99x-3 because they are not getting $3 dollars off their purchase!