You are trying to raise money for a trip and decide to sell a widget. Market research tells you that if you charge $18
you will sell 830 items, and if you change the price to $23.50 you sell 775 items. Suppose your per item cost is $2.50.
Assume that the number of widgets sold y, is a linear function of the price x.
a. Create a linear function to model this situation and determine an appropriate domain.