Answer:
y = 4
Explanation:
As we move from the point (-2, 4) to the point (3, 4), x increases by 5 units, but y stays the same. We know immediately that the slope, m = rise / run, is zero, because of this.
Both points are on the horizontal line y = 4. This answer is sufficient in itself, but could be re-written as y = 0x + 4.