Chapter 8.A, Problem 15E

Linear or Exponential? State whether the growth (or decay) is linear or exponential, and answer the associated question.

1. The population of Meadow View is increasing at a rate of 300 people per year. If the population is 2500 today, what will it be in four years?
2. The population of Wines burg is increasing at a rate of 3% per year. If the population is 100,000 today, what will it be in three years?
3. During an episode of hyperinflation that occurred in Brazil in 1999, the price of food increased at a rate of 30%, per month If your food bill was R$100 one month during this period, what was it four months later? (R$ is the symbol for the real, Brazil's unit of currency.)
4. The price of a gallon of gasoline is increasing by 4¢ per week. 11 the price is $3.10 per gallon today, what will it be in ten weeks?
5. The price of computer memory is decreasing at a rate of 14% per year. If a memory chip costs $50 today, what will it cost in three years?
6. The value of your car is decreasing by 10% per year. If the car is worth $12,000 today, what will it be worth in two years?
7. The value of your house is increasing by $2000 per year.

If it is worth $100,000 today, what will it be worth in five years?

The value of your house is increasing by 4% per year. if it is worth $250,000 today, what will it be worth in three years?