Exponential Function Growth and Decay

What does the model P=A(1+r)^t best represent?

• Exponential growth

• Simple Interest

• Compound Interest

• Exponential Decay

Is this exponential growth or decay?

• Growth

• Decay

What does the a in y=a(1+r)^x  represent?

• Time

• Rate

• Slope

• Initial Amount

What is r, the growth rate, for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x

• y=30(5000)^x

• y=5000(1.3)^x

• y=5000x^x

Choose the correct answer

In an exponential function, what does the a value represent?

• Rate of growth or decay

• Slope

• Initial value

• Exponent

Does the function represent a growth or decay function?

• Exponential GROWTH

• Exponential DECAY

There is a culture of bacteria that begins with 5000 cells and dies by 30% each year. Write an exponential model to represent the situation.

• y = 5000(0.70)^x

• y = 30(5000)^x

• y = 5000(1.30)^x

• y = 5000x^x

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

• Exponential GROWTH

• Exponential DECAY

• Linear

• Not a function