In your presentation, the bar plot looks great but I do not know exactly what it is showing. There is plenty of room at the bottom to add a bullet point or two which you can use as a caption to explain the plot and its significance to your question.
Also, the caption for your knitr table is just "a knitr table" so remember to change that to make it more relevant or describe the type of data in the table/where it originated from.
In your presentation, the bar plot looks great but I do not know exactly what it is showing. There is plenty of room at the bottom to add a bullet point or two which you can use as a caption to explain the plot and its significance to your question. Also, the caption for your knitr table is just "a knitr table" so remember to change that to make it more relevant or describe the type of data in the table/where it originated from.