What is a rate?
A rate is how quickly something happens.
A rate is how quickly something happens with respect to another variable, such as
If something is moving at a quick rate, it is covering many meters for every second. Second is a unit of time, so motion is to do with rates relevant to time.
You can also have a rate of change, which can be any rate, not necessarily to do with time.
For example, a gradient of a graph is how quickly