Question

as the swing moves from point b to point a, which form of energy is increasing, kinetic or potential?

Explanation:

When a swing moves from point B to point A, the height of the swing (and the person on it) decreases. Kinetic energy ($KE = \frac{1}{2}mv^2$) depends on speed, and potential energy ($PE = mgh$) depends on height ($h$). As the swing moves down (toward A from B), speed increases (so KE increases) and height decreases (so PE decreases). So kinetic energy is increasing.

Answer:

kinetic