Lets take the most basic code:
int pointCount = 10000;
double[] x = DataGen.Consecutive(pointCount);
double[] sin = DataGen.Sin(pointCount);
double[] cos = DataGen.Cos(pointCount);
WpfPlot1.Plot.AddScatter(x, sin);
WpfPlot1.Plot.AddScatter(x, cos);
<WpfPlot Name="WpfPlot1" />
It will generate two plots on one chart.
And I can't figure out how to hide specific plot, for example first one. It seems there is no out of the box functionality here, so you have to add some buttons yourself, but I can't even find any function that hides it. Zero info inside documentation.