Choice B is the correct answer. Analyze the features of the function.

1. Initial Value: $a=2$, so y-intercept is 2.
2. Growth/Decay: $b=3 > 1$, so it is increasing (growth).
3. Shape: Exponential growth curves up rapidly.

💡 Strategic Tip: Growth curves go up to the right. Decay curves go down to the right.

Choice A is incorrect because it is not linear. Choice C is incorrect because it represents decay. Choice D is incorrect because the y-intercept is 2, not 3.