6.1, 6.2 and 6.7 Review: Part 1

Which function shows exponential decay with base between 0 and 1?

• x = 0

• y = 0

• y = 3

• x = 3

• Both are increasing for all x

• Both share asymptote y = 0

• Both share asymptote x = 0

• Both have y-intercept at y = 2

• (0, 1)

• (1, 0)

• (1, 2)

• (0, 2)

• Vertical stretch by 2

• Horizontal shift right 2

• Reflection over y-axis

• Reflection over x-axis

• Decay factor 1/3

• Growth factor 1/3

• Growth factor 0.99

• Decay factor 0.99

Which function represents exponential growth?

A population of 1,236,000 grows 1.3% per year. Which model fits t years?

• P(t)=1,236,000(0.987)^t

A population of 752,000 decreases 1.4% per year. Which model fits t years?

Darren invests $4,500 at 5% for 10 years. Which expression gives daily compounding?