Can someone please help I really need help

  see below

Step-by-step explanation:

Each point and line moves to half its previous distance from the center of dilation, the origin. So, the point (-10, -10) moves to (1/2)(-10, -10) = (-5, -5). The dilation factor applies in the same way to other coordinates.

I find it easy enough just to spot the points on the graph and draw the lines between them.

the answer is 99.