Bookdown - inserting a graphic image

I am now in day 2 of trying to learn RStudio, and the results have been mostly positive, but I have a problem inserting images in a bookdown book.
I write:


The image is correctly inserted, but in my PDF I see this:


So the code does what I ask, but why is the knitr line also visible?

@wmeyer48 by default, bookdown will print the R code. You can avoid the code to be printed by using

```{r echo=FALSE}

Though that solved the problem of inserting the graphic, I am now having no success trying to assign it a caption. I found nothing in the knitr docs for include_graphics which would help.

Doc is here:

and caption mechanism works the same as with plot, you can use the chunk option caption for include a caption to the image.

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