11/14 Writing Exponential Functions

A forest with a population of 20 squirrels doubles every year. What equation models this?

• The number of cattle in the town.

• The initial amount of people in the town.

• How quickly the town is growing.

• The amount of people in the town after 1 year.

• The number of cattle in the town.

• That the population is tripling.

• That the population is growing by three people every year.

• The initial population of the town.

A 1000 phones loses 1/3 of its value each year. What equation can model the value of the phone after x years?

A 1000 phones loses 1/3 of its value each year. What is the value of the phone after five years?

• $131.69 

•  $4.12

•  $998.33

•  $243.17

A town of 1000 people gains 1/4 of its population every year. What equation can model the population after x years?

A town of 1000 people gains 1/4 of its population every year. Approximately how many people will live in the town after 10 years?

•  56 people

•  9 people

•  9313 people

•  4584 people

• The paper started with an area of 90 square inches.

• The paper was folded 90 times.

• That 90 origami swans will fit on a standard plate.

• The maximum number of times the paper can be folded.

• The paper is losing 1/3 of its area.

• The paper is keeping 1/3 of its area.

• The starting area was 1/3 square inches.

• It takes 1/3 of a minute to fold the paper.

• That the car is keeping 3/4 of its value.

• That the car is losing 3/4 of its value.

• That the car gets 3 or 4 miles per gallon of gas.

• That the car is gaining 1/4 in value.