Exponential Growth and Decay Factor vs Rate

Milton has his money invested in a stock portfolio. The value, v(x), of his portfolio can be modeled with the function v(x) = 30,000(0.78)^x, where x is the number of years since he made his investment. Which statement describes the rate of change of the value of his portfolio?

• It decreases 78% per year.

• It decreases 22% per year.

• It increases 78% per year.

• It increases 22% per year.

• The graph is decreasing.

• The graph passes through the point (0,1).

What is the growth/decay rate (r)?

In an exponential function, to have an decrease of 9% you have do the following: 

(select 2)

• Change 109% to a decimal which is 1.09

• Change 91% to a decimal which is 0.91

What type of function is this equation:
y=  4^x+1

• Linear

• Exponential

• Neither

What type of function describes the story below?
You have $5 and triple your money every day. 

• Linear

• Exponential

• Neither

What functions describes this graph?

• Linear

• Exponential

• neither

Which function describes the table?

• linear

• exponential

• neither

Which equation describes the story below?
You have $5 and triple your money every day. 

• y=5(3)^x

• y=5^x

• y=5(3x)

• y=15^x

The growth rate is 12%. The growth factor is...