Choice A is the correct answer. Compare growth factors.

1. Function A: Base $b = 1.5$.
2. Function B: Base $b = 2$.
3. Comparison: $2 > 1.5$, so Function B grows faster despite smaller initial value.
4. Long-term: As $x \to \infty$, 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.