Is the Function Linear or Exponential?

Is the function described here linear or exponential?

• Linear

• Exponential

• Neither

Is the function described linear or exponential?

• Linear

• Exponential

• Neither

Is the function Linear or Exponential? $y\ =\ 5\cdot3^x$  

• Linear

• Exponential

• Neither

Is the function Linear or Exponential? $f\left(x\right)=3x\ -\ 8$  

• Linear 

• Exponential

• Neither

Is the function Linear or Exponential?  $y\ =\ 6x^3$  

• Linear

• Exponential

• Neither

Is the function linear or exponential?  $y\ =\ 4\cdot0.3^x$  

• Linear

• Exponential

• Neither

Which of the following graphs are LINEAR? Select all that apply

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Which of the following graphs are EXPONENTIAL?

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An investment of $8000 in a certain Certificate of Deposit (CD) doubles in value every seven years. The function that models the growth of this investment is f (x) = 8000 • 2^x, where x is the number of doubling periods. If the investor does not withdraw any money from this CD, how much money will be available for withdrawal after 28 years (which means x = 4)?

• $128,000

• $8000

• $2

• $16,000

A new car costs $15,000 to build in 2010. The company’s financial analysts expect costs to rise by 6% per year for the 10 years they are planning to build the car. The cost to build the car can be modeled by the function f (t) = 15,000 (1.06)^t , where t is the number of years after 2010. How much will it cost the company to build the car in 2017 ( so x = 7 years)

• $22,554.45

• $15,000

• 7 years

• 2017