Exponential functions 1

Which of the following is an exponential function?

• y = x²

• f(x) = 3x³

• y = x³

• f(x) = 3^x

What is the initial value in y=4(2)^x

• 4

• 2

• x

What is the y-intercept in y=4(2)^x

• (4,0)

• (0,2)

• x

• (0,4)

• (4,2)

What is the common ratio for the function f(x) = 25 (4)^x

• 25

• 4

What is the "a" or y-intercept of the function?

• 2

• 1

Match the following

• Decay

• 
• y-intercept

• 
• Growth

• Growth/Decay Factor

• a

• Exponential Function Equation

• b

Pick the equation that is exponential decay

• y = 2000(0.88)^x

• y = 0.5(1.88)^x

• y = 10(3/2)^x

• y = 0.8(13)^x

Which equation matches the graph?

• y = 2^x+3
• y = 2^x + 3
• y = 2^x
• y = 2^-x

Is the table linear, exponential, or neither?

• Linear

• Exponential

• Neither

The equation for this table is 

• y = 1(2^x)
• y = 1(12^x)
• y = 12x
• y = 12x + 1