1. Jena bought a new car in 2010 for $30,000 and its value depreciated linearly over the years. In 2015, she sold the car for $21,750; what is the yearly depreciation of the car? 2. Sherryl bought a home for $300,000 and after 5 years she sold the home for $350,000. What was the appreciation rate for the home during this period assuming linear appreciation?

3. Sam was 5 feet tall when he was 10 years old and 6 feet tall when he was 18 years old. What is Sam's growth rate in ft/year during that period of time i. e. find the slope of his yearly growth? Note that slope is rate of change of something and in this case that something is height.