Choice A is the correct answer. Use differences in the table.

1. Change in y: $9 - 5 = 4$.
2. Change in x: $4 - 2 = 2$.
3. Slope: $\frac{\Delta y}{\Delta x} = \frac{4}{2} = 2$.

💡 Strategic Tip: Don't just look at the y-change! You must divide by the x-change.

Choice B is incorrect because it is just $\Delta y$. Choice C is incorrect because it is $\frac{\Delta x}{\Delta y}$. Choice D is incorrect because it is $\frac{\Delta x}{\Delta y}$.