Exponential Functions Intro and Review

Which equation is represented by the table?

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x

• y = 15(1.35)^x

• y = 15(0.35)^x

• y = 35(1.15)^x

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

• (.27)^x
• .27
• 13
• 3.51

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(1 - .08)^x

• y=15,000(0.08)^x

Is this exponential growth or decay?

• Growth

• Decay

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

• SLOPE

• RATE OF CHANGE

• Y-INTERCEPT

• COMMON RATIO

What is the y -intercept of  y=3(4)^x?

• 1

• 0

• 4

• 3

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

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