Compare Functions to Determine the Better Buy

The video tutorial addresses a standardized math test question involving function comparison. It is divided into four parts, each focusing on different aspects of the problem. Part A involves determining the cost per shirt at a local store using a graph. Part B requires writing a function for the total cost of shirts from the local store. Part C involves creating a function for the cost of buying shirts online, including a shipping fee. Part D compares the total costs from both sources to determine the cheaper option. The tutorial concludes that buying online is more cost-effective.

What is the cost in dollars for each shirt at the local store?

Write a function that can be used to find y, the total cost in dollars of buying x shirts from the local store.

Explain why the function for the local store is considered a discrete function.

What is the slope of the function representing the cost of shirts from the local store?

What is the equation representing the cost of buying shirts online?

What factors should the teacher consider when deciding where to buy the shirts?

How does the cost of buying shirts online compare to buying them from the local store?