Identifying Exponential Functions Growth and Decay

Which equation is represented by the table?

• y = 40(2)^x

• y = 40(1/2)^x

• y = 40 - 2x

• y = 40 - 1/2x

Given y=3^x determine the y-intercept 

• (0,1)

• (0,3)

• No Y-intercept

• y=1

What function is present? 

• Absolute Value

• Exponential Decay

• Linear Equation

• Exponential Growth

Identify the y-intercept and the decay factor in the function f(x) = -2 (1/3)^x .

• a = 1/3 ; b = -2

• a = -2 ; b = 1/3

• a = x ; b = -2

• a = -2 ; b = x

Which of the following functions is represented by this graph?

• f(x)=2(1.2)^x

• f(x)=2(0.75)^x

• f(x)=6(0.75)^x

• f(x)= −2(0.75)^x

What is the domain and range of the function y=2^x ? Use the graph to help!

• Domain: (−∞,∞)

  Range: y>0

• Domain: (−∞,∞)

  Range: y>1

• Domain: x>2

  Range: y>0

• Domain: x<2

  Range: y>0

Which table represents an exponential function? Select all that apply.

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The equation for this exponential function is

• y = 1(2^x)

• y = 1(4^x)

• y = 3x

• y = 1(3^x)

The equation for this table is 

• y = 100(2^x)

• y = 2^x

• y = 2x + 100

• y = 100^x

The equation for this table is

• y = 3x + 50

• y = 50^x

• y = 3^x

• y = 50(3^x)