Recognizing Exponential Equations

Is the pictured graph growth, decay, or linear or none?  

• Growth

• Decay

• Linear

• None

The equation for this table is

• y = 3x + 50

• y = 50^x

• y = 3^x

• y = 50(3^x)

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What was the population in 1990? 

• 0 people

• It doesn't say

• I don't know

• 6191

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What percent did the population increase each year?

• 4%

• It doesn't say

• I don't know

• 400%

Denise has $80 in a savings account that earns 10% interest, compounded annually.
To the nearest cent, how much will she have in 3 years?

• $106.48

• $26.48

• $8 

• $104

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x

• y = 15(0.35)^x

• y = 15(1.35)^x

• y = 35(1.15)^x

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months?

• 9765

• 9006

• 5433

• 9766

Simplify the exponential expression.

• 2x⁶y¹²

• 2x⁵y⁷

• 8x⁶y¹²

• 8x⁵y⁷

Simplify the exponential expression:

• 10x^-2

• 2x²

• 2x¹²

• 10x¹²

Solve:
16^x-3 = 8^x-3

• 9

• -3

• 0

• 3