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# Common Core Standard HSF-LE.A.1c Questions

Recognize situations in which a quantity grows or decays by a constant percent rate per unit interval relative to another.

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The graph of exponential growth is described best by the following:
1. The graph is a horizontal line.
2. The graph is a vertical line.
3. The graph drops from the left to the right.
4. The graph raises from the left to the right.
Which function represents exponential decay?
1. $f(x) = 2^x$
2. $f(x) = 8(0.9)^x$
3. $f(x) = 6x^2$
4. $f(x) = 0.9 * x$
Grade 9 Linear Equations CCSS: HSF-LE.A.1c
Your friend bought a car for $24,000. The car depreciates at the rate of 10% per year. What is your car worth in 3 years? Write and solve an exponential decay model to represent the car's value. 1.$29,040; $y = 24,000(1.1)^2$
2. $19,440; $y = 24,000(0.9)^2$ 3.$17,496; $y = 24,000(0.9)^3$
4. \$31,944;$y = 24,000(1.1)^3$