Question

Describe a real-world situation that can be modeled by the function y=2x-3.

I was thinking of something like "there are cookies at T-t-t-target for 2 dollars each. Target is also offering 3 dollars off your purchase for Christmas." Does this work?

Answer 1

Yes you have a good example.

x = number of cookies

2*x = total amount spent on cookies at $2 each

2x-3 = amount you pay after the $3 discount is applied one time for the entire order

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a more numeric example may be this

Lets say you bought 12 cookies, so x = 12

This means it costs 2*x = 2*12 = 24 dollars total if the discount doesnt apply

However, the 3 dollar discount is there, so the grand total is 24-3 = 21 dollars.