I have created a parabola but I would like to show my work using R Markdown. I have put in the procedure as follows: 

`{r}
plot( function(x) 352 - 352*x + 91*(x^2))`

`{r}
p <- polynomial(c(-10,-3,1))`

`{r}
plot(p, xlab="Beta", ylab="Sum of Squares")`

I feel like I am doing it correctly but when I open the HTML document, it just shows a blue icon with a question mark in the middle (similar to when you open a browser but can't view the photo). Anybody Help?