Topic 6 Quick Review 1st

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

• Input

• Rate of change

• Y-intercept/Initial value

• Output

• 9600

• 12,800

• 200

• 8000

Is this exponential growth or decay?

• Growth
• Decay

Pick the equation that is exponential growth

• y=2(0.5)^x
• y = 0.5(2)^x

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

• 1
• 0
• 4
• 3

A publishing industry report predicts that magazine subscriptions will drop by 10% each year. If this prediction is correct, then how many subscribers will a magazine with 98,000 subscribers have in 10 years? (Round to the nearest whole number if necessary).

• 34,170

• 16,348

• 7690

• 76,023

A publishing industry report predicts that magazine subscriptions will drop by 10% each year. If this prediction is correct, then how many subscribers will a magazine with 98,000 subscribers have in 10 years? (Round to the nearest whole number if necessary).

• 34,170

• 16,348

• 7690

• 76,023

Lauren has $90 in a savings account. The interest rate is 5%, compounded annually. To the nearest cent, how much will she have in 2 years?

• $99.23

• $21.98

• $56.46

• $9.21

Classify the model as Exponential GROWTH or DECAY.
A=10(1.01)³

• Growth

• Decay

What is the y-intercept of the function?

• 2

• 3

• 1

• -2