1) Last year you made $35,000. If this year you make $38,000, what is the percentage change in your salary? 

2) Last year it cost $800 for a new 60 inch LED TV. If today it costs $735 for the same TV, what is the percentage change in price of the TV? 

3) Assume you observe interest rates of 8%, 4%, 6%, and 10% for 2016, 2017, 2018, and 2019 respectively. What was the interest in 2017? 

4) Assume you observe interest rates of 14%, 9%, 7%, 12%, and 10% for 2016, 2017, 2018, 2019, and 2020 respectively. What was the interest in 2017? 

5) Assume you observe interest rates of 14%, 9%, 7%, 12%, and 10% for 2016, 2017, 2018, 2019, and 2020 respectively. What was the interest in 2018?