Writing Exponential Functions

The population of 10,000 mosquitos is cut in half each month when a colony of bats moves in the area. What is the equation?

• 10000(1.5)^x

• .5(10000)^x

• 10000(0.05)^x

• 10000(0.5)^x

Layla's 4 hour daily phone time decreases by 5% per day.

• 4(1.05)^x

• 4(.5)^x

• 4(.95)^x

• 4(5)^x

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. What does the 30000 mean?

• Starting amount

• Growth rate

• Final amount

• X-values

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. Is his account growing or decaying?

• Growing

• Decaying

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. At what percent is his account growing or decaying?

• 3.5%

• 1035%

• 3000%

• 35%

Is the equation below growth or decay? F(x) = 10(4.5)^x

• Growth

• Decay

What is the y-intercept? F(x) = 10(4.5)^x

What is the range of this situation?

• x > 0

• 0 < x < 10

• 0 < y < 45000

• y < 45000

What is the exponential equation for the table below?

• y = 3500(1.05)^x

• y = 3500(.95)^x

• y = 3325(1.05)^x

• y = 3325(.95)^x

Which equation best matches this graph?

• y = 45000(1.12)^x

• y = 45000(.88)^x

• y = 45000(.08)^x

• y = .88(45000)^x