### Scatter chart tests

Normal - four series', all random (40 points)
Normal - one series', all random (5 points), zero left margin
Zero right margin, 200 points
Bigger margins
Zero data points
One point.
Two points
Three series', one point each
Three series', first one has zero points
Lots of series
Scatter plus line: y=2x + 0
Scatter plus line: y=2x + 10;
Scatter plus line: y=-0.5x + 1.0;
Scatter chart: duplicate y values
Scatter chart: duplicate x values
Scatter chart: extremely small data points (1e-10)