The number of umbrellas sold and the amount of rainfall on 9 days is shown on the scatter graph and in the table. The graph shows that there is a positive correlation between the number of umbrellas ...

Graphs can have: positive correlation; negative correlation; or no correlation. Positive correlation means as one variable increases, so does the other variable. They have a positive connection.

I'm looking for a javascript solution to plot scatter and trend lines. Something like Highcharts' scatter and regression (http://www.highcharts.com/demo/combo ...