JMeter - response time calculation

Question

Can someone explain me please how JMeter calculate response time?

I need to understand this graph: Response Times Over Time.

Answer 1

Response time is also known as time to last byte while Latency is time to first byte:

• Time to last byte - time from the moment the request was sent till the last resource is finished downloading.
• Time to first byte - time from the moment the request was sent till the first byte of the first resource is received back.

Is that what you wanted to know or have I misunderstood your question?

EDIT:
Here is a more detailed explanation off all possible performance measurements.