Choice A is the correct answer. Isolate $y$.

1. Add 10: $x + 10 = 5y$.
2. Divide by 5: $y = \frac{1}{5}x + 2$.
3. Slope: $\frac{1}{5}$.

💡 Strategic Tip: Don't assume the number next to $y$ is the slope.

Choice B is incorrect because it ignores division. Choice C is incorrect because sign error. Choice D is incorrect because sign error.