A point P(x,y) = (5, 7) on the coordinate axis, is transformed to Q(x,y) = (5, 2). The process of transformation is
Translation
The point P and Q are in the same plane XY. So, the process of transformation cannot be reflection.
In translation, there will be a change in position from the previous one. Here, there is a change in position of the point on Y-axis. So, this is translation.