This reusable scatter plot visualizes the relationship between total bill and tip amounts from the tips dataset. D3 v7 defines a `scatterPlot()` function that implements `d3.scaleLinear` for axes, `d3.scaleOrdinal` with `d3.schemeTableau10` for day-of-week coloring, plus `d3.axisBottom` and `d3.axisLeft` for ticks. The SVG rendering includes semi-transparent circles, axis labels, and a custom legend built with `selection.append`. The chart uses getter/setter methods for width, height, and data accessors.