Consider the function 𝑓 that inputs the number of people who stop at a gas station and outputs a prediciton for how many bags of chips the gas station will sell. And consider 𝑔 that inputs the price of gas and outputs how many people will stop at the gas station.
What does 𝑓−1 input and output?
What does 𝑔−1 input and output?
What does 𝑔−1∘𝑓−1𝑥 input and output?