Could you explain the issue in greater detail? Your picture was blocked by the firewall. I am a Minitab user.

Thanks for your answer.............

I uploaded image again:

I want to find a simple regression equation (like y=ax+b). so I used my data in two columns. but my data has Outliers. so I want to Ignore all of them. but I don't want to delete the rows, because that is difficult and I want to draw about 30 same diagrams.

for example, Imagine your data is:

y x

1 1

2 2

3 3

4 4

100 5

if you write these numbers in two columns and use Regression from this path:

stat>>Regression>>Regression..

and choose y as response and x as predictor and if you mark Result that shows the equation, so we have this in Results:

=====================================================

also and if we write these numbers:

y x

1 1

2 2

3 3

4 4

5 100

we have this:

============================================================

you know both of the answers are not correct because the point (100 5) and (5 100) are Outliers and correct equation is y=x for two answers.

also Minitab just shows Outlier in second answer but doesn't Ignore it.

My questions are:

1- how we can Ignore Outliers to have correct regression equation??

2- why minitab doesn't Recognize Outlier in first data??

Thanks a lot!