If there is 30 people on a greyhound and 1 got before the greyhound bus how many is there to get off on the next stop?

Rotation 180° clockwise about point (0, 2)

Step-by-step explanation:

From inspection of the graph, the initial interpretation is that B is a reflection of A in the y-axis and then shifted one unit down.

However, we are told this is a single transformation, so it cannot be a reflection.  If it not a reflection, it must be a rotation.

From inspection we can see that it has been rotated 180° clockwise about a point.  

To determine the point, draw a line between corresponding points on the shapes.  The point of intersection of these lines is the point of rotation.