you are buying orange juice for $4.50 per container and have a giftcard worth $7 . the function f(x)=4.50x-7 represents your total cost f(x) if you buy x contrainers of orange juice and use the gift gard how much do you pay for 4 containers of orange juice
To calculate the total cost of buying 4 containers of orange juice and using the gift card, we need to substitute x = 4 into the function f(x) = 4.50x - 7:
f(4) = 4.50(4) - 7
= 18 - 7
= $11
Therefore, you would pay $11 for 4 containers of orange juice.