Using some algebra, you determine the equation to represent the relationship between the
selling price (s) and the profit (f(s)) (assuming you continue the trend of raising the price
by $5 and selling 100 less) is f(s)=-20s +1400s-12,000. Above is the graph of the
function.
1. What is f(10) and what does this mean in the context of the problem?
2. What is f(20) and what does this mean in the context of the problem?
3. What is the meaning of the vertex of the graph?
4. How many sweatshirts had to be sold to make a profit of $10,000?
5. What is the domain and range of the function in the context of this problem?
6. If you had a choice, what price would you set for the sweatshirts, and why?