Understanding exponential and logarithmic functions

Which function models exponential decay?

• f(x) = 3(1.65)^x

• f(x) = 0.7(3)^x

• f(x) = 6(0.75)^x

• f(x) = 2(2.05)^x

Which function is exponential?

• A

• B

• C

• None of these options

The growth factor for this table is 

• 2
• 4
• 12
• 144

What is the formula for Exponential Growth?

• 
• 
• y = a . b^x (b>1)

• 

The growth factor for this table is 

• 2

• 4

• 12

• 144

Select the functions that are exponential growth.

The number of bacteria in a certain culture doubles every hour. If there were 30 bacteria present in the culture initially, how many bacteria will be present at the end of 8th hour?

Is this an example of exponential growth or decay?

• growth

• decay

Determine whether the set of data shown below displays exponential behavior. 

• yes

• no

Which of the following represent exponential growth?

• A=P(1+r/n)^nt
• A=Pe^rt
• y=a(1-r)^x
• y=a(1+r)^x

Which function represents the table of values?

• f(x) = 4x

• f(x) = x³

• f(x) = 4^x

• f(x) = 3^x