Hi Hive account@jaineel. You are confused... means I didn't do a good job :-(!

Let me try again :-)

I do not have a rubber band with me. I'll make a diagram for you instead :

Imagine a rubber band with 3 points, A, B and C. Points are distant from each other by 1 meter. So AB = 1m and AC = 2m. Now pull the rubber band to extend it to twice its size (The red arrow represents the pulling force). Suppose it took you 1 second to do so.

The distances are now AB = 2m and AC = 4m.

Speed is distance covered over time. Relative to A, B covered 1 m in 1 second, so its speed is 1 m/s. Still relative to A, C covered 2 meters so its speed is 2m/s.

This is because each meter of a length has increased by an extra meter every second. So if you extend a dimension of space (here the rubberband), the speed of recession of any point of that space relative to a reference will be proportional to the distance from that reference point.

In cosmology, this is referred to as Hubble’s law.

Hope it clarifies!