Learn more about scatter diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14. ... Plot each data point carefully on the graph.

Anyway, here's the plot diagram: Click here for a much larger version -- SPOILERS ABOUND! If you're into this sort of thing, check out J.K. Rowling's Plot Spreadsheet. (Via In Contention.) ...

A key to this success is a graph that two astronomers introduced 100 years ago. The Hertzsprung-Russell (H-R) diagram is simple. It plots two basic properties of stars: their luminosity ...