exponential

What values of b make an exponential growth function?

• b > 0

• b <1

• b > 1

• 0 < b < 1

What values of b make an exponential decay function?

• b > 0

• b < 1

• b > 1

• 0 < b < 1

Is this exponential growth or decay?

• Growth

• Decay

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• f(x)=400(1+3)^x

• f(x)=400(1-0.03)^x

• f(x)=400(1+0.03)^x

• f(x)=400(0.03)^x

A new savings account is opened with $400 and gains 3% every yr. What's the amount after 5 years?

• $415

• $463.71

• $343.49

• $460.12

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation?

• y=8(15,000)^x

• y=15,000(1.08)^x

• y=15,000(0.92)^x

• y=15,000(0.08)^x

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the value after 7 years?

• $800

• $8367.70

• $6600

• $25,707.36

Identify the y-intercept (initial value) in the function f(x)=13(.27)^x

• (.27)^x

• .27

• 13

• 3.51

You invest $400 for 5 years and the interest rate is 4.29% each year. 

• y=400(1 - 0.0429)⁵

• y=400(1+.0429)⁵

• y=400(1+ 4.29)⁵

• y=400e^0.049*5