I'm trying to make a graph to see the differences in student testing by age and their school rating. I could very easily make a scatterplot with student test scores by age and another for student test scores by school rating. But how can I get them on the same graph in a way that will tell me something?

I know how to use primary and secondary axes -- but those seem to show me how I would use those two graphs separately, just on the same graph. Which is definitely better, but not what I'm looking for. Since the idea is that there's only a correlation between age and rating, I think I'm thinking about graphing it the wrong way.

My hope was that the x-axis would be the 1-10 ratings, while the test scores would be one y-axis and the age would be the other -- but the score plots and the age plots wouldn't be so distinct.

Any suggestions? It might be less of a graphing question and more of a formulaic one (which is why I'll post it in general) -- but I thought that there was a way to manipulate this data and show the results by both criteria at once, rather than just showing both criteria separately on one graph.

Attached is a subset of some data and the graph I made that's not very helpful:
ScoringSample.xlsx

Thanks, any help is appreciated!