To auto correlate the graphs in LoadRunner analysis is done with the below mentioned steps:

1) Open the Load Runner Analysis

2) Select a graph

3) Choose the menu options View > Auto Correlate Graphs

4) The Correlate Graphs dialog box opens

5) Select a measurement to correlate with which you want to auto correlate your active graph. Only the graphs with a common x-axis to the active graph are available.

6) Select the time range for auto correlation

7) Select the correlation options, and choose which are the other graphs that you want to correlate with

8) Click OK.