CCSS IP Math I 2.7.2 Example 3

A clothing store discounts items on a regular schedule. Each week, the price of an item is reduced. The prices for one item are in the table below. Week 0 is the starting price of the item. Determine a linear or exponential equation that represents the relationship between the week and the price of the item.
  1. Create a graph of the data.
  2. Determine if a linear or exponential equation could represent the data.
  3. Find the common ratio between the terms.
  4. Use the value of the equation at = 0 and the common ratio to write an equation to represent the relationship.