Plot is showing problem in graphics

On writing right syntax... I am giving this image showing the plot I am receiving... In this plot giving color to the plot and changing its style is not working.

Looking forward for your help

Thank you

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

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