Question

what is the approximate speed that galaxy y is moving?
300 km/s
20,000 kilometers
20,000 km/s
300 million parsecs

Explanation:

Step1: Locate Galaxy Y on graph

Find the point marked as Galaxy Y on the velocity - distance graph.

Step2: Read velocity value

The velocity axis is labeled in km/s. The y - coordinate of the point for Galaxy Y is approximately 20000 km/s.

Answer:

20,000 km/s