Basics on Exponential Functions

Which equation is represented by the table?

• y = 40(2)^x

• y = 40(1/2)^x

• y = 40 - 2x

• y = 40 - 1/2x

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

• Input

• Rate of change

• Y-intercept

• Output

Write the function for the following table:

• f(x) = 5x + .08

• f(x)= 5x + 2

• f(x) = .08(5)^x

• f(x)= 2(5)^x

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

Which table represents the following equation?

• 
• 
• 
• 

Write an equations that models the data shown.

• 1600

• 2

• There is not enough information to tell.

Suppose the population of a species of insects doubles every year. The function gives the number of insects after x years. How many insects will there be after 3 years?

• 9600

• 12,800

• 200

• 8000

• $ 819.20

• $ 1.4

• $ 140

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth

• Linear

• Exponential Decay

• None of the Abovee