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# Workflow Polynomial regression in Rapdminer 9.5

Hello all,

sorry but I have two perhaps simple questions that I still can't answer after two weeks of searching.

1. How can I use linear regression and polynomial regressions both in the workflow with root mean squared error as a metric?

2. I have worked them out separately, see the workflow in the attachment, but I get two completely different results? I think that the polynomial, in particular, is rather strange to interpret. I do exactly the same workflow as the linear regression both with factor 1 and with factor 2. I have read on this community that it must be factor 2?

I hope you will help me with this how I can solve this.

Thanks in advance!

Greetings,

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## Answers

2,959Community ManagerScott