Jack Nilan
Application of Composition Functions
Suppose you got a coupon for $5 off a pair of any jeans at Old Navy. When you get to the store you find out that there is a sale with 25% off all jeans.
Let x represent the cost of the jeans. For 1 – 4 write the kind of translation/transformation the function is from the original cost of the jeans.
1. Write a function f(x) that represents the cost of the jeans just using your coupon.
2. Write a function g(x) that will represent the cost of the jeans just using the discount.
3. Write a function h(x) that will represent the cost of the jeans if you use your coupon first and then apply the discount.
4. Write a function j(x) that will represent the cost of the jeans if you use your discount and then use the coupon.
5. You find a pair of jeans for $36, How much would you pay using h(x)? How much for function j(x)?
6. Graph both function on graphing calculator. Will one of the functions always be better? Why?
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