A 180 degree turn means that the point practically reflects over the y-axis. The number of spaces away from (0,0) that Point Q was originally is the number of spaces that Point Q will still be from (0,0). Point Q, like already said, will just be on the other side of the y-axis. Point Q's original coordinates were (0,-4), which means that point Q was originally 4 units away from (0,0) on the x-axis on the left side of the y-axis. That means with a 180 degree transformation, Point Q will be still 4 units away from (0,0) on the x-axis, but on the right side of the y-axis. The new coordinate pair for Point Q would be (0,4), which is also where Point B is plotted on the graph. Therefore, Point B would be the new image of Point Q.
