Explain this please been stuck on it for a while

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.