dot with linearRegressionY on the same rows to draw a least-squares trend line through every car's power and fuel economy.r to a field and give rScale a square-root scale, so each penguin's body mass sets its bubble's area while color marks its species.CanvasChart to draw hundreds of sized, colored dots on a canvas instead of one SVG element per point.scaleLog instance with a fixed domain to the x scale, so sizes from a few hundred to tens of thousands share one readable axis.lineY, then add arrow marks for direction and text labels every five years.rollingWindow with a first reducer to pair each close with the previous day's, plotted against a dashed line of equal values.binX and binY histograms in a viewGrid, with share lining each histogram up with its axis.guides to false and add a rounded frame mark to set the plot area apart when the chart has no axes or gridlines.fold and normalize to put four events with different units on one 0 to 100 scale, with a line per country across them.facet with columns set to 4 to draw one scatterplot per set on shared, fixed x and y domains.