7

Set 9: Exponential Functions

Explanation

Answer: A

Which function has a graph that increases faster as xx gets larger?

Function A: y=100(1.5)xy = 100(1.5)^x Function B: y=50(2)xy = 50(2)^x

A.

Function B

✓ Correct
B.

Function A

C.

They increase at the same rate

D.

Cannot determine

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Compare growth factors. 1. Function A: Base b=1.5b = 1.5. 2. Function B: Base b=2b = 2. 3. Comparison: 2>1.52> 1.5, so Function B grows faster despite smaller initial value. 4. Long-term: As xx \to \infty, the base matters more than the coefficient. Strategic Tip: Larger base = faster exponential growth in the long run. Choice B is incorrect because Function A has a smaller base. Choice C is incorrect because different bases mean different growth rates. Choice D is incorrect because we can compare the bases.

Key Steps:

The correct answer is Function B

Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.

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