You are buying orange juice for $4.50 per container and have a gift card worth $7. The function
f(x) = 4.50x -7 represents your total cost f(x) if you buy x containers of orange juice and use the gift card. How much do you pay to buy 4 containers of orange juice? Show your work.
$25
$11
$9
$18
To find out how much you would pay to buy 4 containers of orange juice, you need to substitute x = 4 into the function f(x) = 4.50x -7.
f(x) = 4.50(4) - 7
f(x) = 18 - 7
f(x) = 11
Therefore, you would pay $11 to buy 4 containers of orange juice. The answer is $11.