Exponential Functions Unit Review

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

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

Write the function for the following table:

• f(x)= 1(2)^x

• f(x)= 2(1)^x

• f(x) = 2x+1

• f(x)= x+2

What type of pattern do exponential functions have?

• Adds or subtracts by the same number every time

• Multiplies or divides by the same number every time

• Square roots all the inputs

What type of pattern do linear functions have?

• Adds or subtracts by the same number every time

• Multiplies or divides by the same number every time

• Square roots all the inputs

In an exponential function, what does the 'a' represent?

• Input

• Rate of change

• Y-intercept/Initial value

• Output

In the linear equation, y = mx + b, the letter b is the ___________.

• y-intercept/initial value

• x-intercept

• slope

• rate of change

In the linear equation, y = mx + b, the letter m is the ___________.

• y-intercept/initial value

• x-intercept

• slope/rate

• multiplier

Suppose the population of a species of insects doubles every year. There are 1600 insects initially. The function for the scenario would be?

• $ 819.20

• $ 1.4

• $ 140