# How can I see sample autocorrelation from time series plot?

Lets say I am given time series plot.

How can I estimate $r_1$ and $r_2$ which are sample correlation? I don't understand how to see correlation from data plot.
I know how to get and use ACF and stuff from the data itself but I am having problem with understanding time series plot.

• Why would you try to eyeball a correlation? What's AFC? Mar 24 '15 at 5:48
• It is ACF, AFC was typo. Well, I was told to do eyeball it for problem sets and I was really wondered how it works. I have quite amount of stat courses but I always have hard time understanding the plot and eyeball it.
– Kane
Mar 24 '15 at 22:51