Linear Versus Exponential Function

“There are 20,000 owls in the wild. Every decade, the number of owls is halved.” Can this be modeled with a linear or exponential equation?

• Linear

• Exponential

"Julie gets a pre-paid cell phone. Initially she has a $40.00 balance on the phone. Each minute of talking costs $0.15."

• Linear

• Exponential

Julie gets a pre-paid cell phone. Initially she has a $40.00 balance on the phone. Each minute of talking costs $0.15. Linear or exponential?

• y=40x+.15

• y=40-.15x

• y=40(1.015)^x

• y=40+.15x

• y=40(.15)^x

Is the pictured graph growth, decay, or linear or none?  

• Exponential Growth

• Exponential Decay

• Linear

• None

Which type of regression model does the scatter plot appear to show?

• linear

• exponential

• quadratic

What type of function is y = 7(5/4)^x?

• Exponential Growth

• Exponential Decay

• Linear

• None of the above

True or False: If a variable grows exponentially, its logarithm grows linearly.

• True

• False

Is the table linear or nonlinear?

• Linear

• Nonlinear

• A
• B
• C
• D

Is this function linear or nonlinear?

• Linear

• Nonlinear