Exponential functions Quiz

1. Which graph passes through $(0,1)$ and has asymptote $y=0$?

• A. $y=x^2$
• B. $y=2^x$
• C. $y=2x+1$
• D. $y=x+1$

2. A population of 200 grows by 10% each year. Which model is correct?

• A. $P=200+10t$
• B. $P=200\times10^t$
• C. $P=200\times0.1^t$
• D. $P=200\times1.1^t$

3. Evaluate $5^{-2}$.

• A. $-25$
• B. $-10$
• C. $\frac{1}{25}$
• D. $25$

4. \1000$ is invested at 6% compound interest for 3 years. What is the final value, to the nearest dollar?

• A. \1191$
• B. \1180$
• C. \1060$
• D. \1800$

5. A value decays by 20% each year. What is the growth factor?

• A. $0.2$
• B. $1.2$
• C. $0.8$
• D. $-0.2$