# Showcase

The flagship XWUIChartRegressionScatter demo. It walks three correlation strengths, four sample sizes from a dozen points to three hundred, the four block presets, the sm/md/lg size scale, the independent axis and grid toggles, trend line weight, dash and colour, and a negative real-world fit (kerb weight against fuel economy) with the value-label, interactive and loading states.

The renderer plots the first series as a scatter cloud, fits an ordinary least squares line and shades a 95% band from the residual standard error, so every cloud here uses numeric x values. Points come from a seeded inline generator and every colour resolves from a theme token.