# XWUIChartXYScatter

An XY scatter chart backed by `XWUIChart` that plots individual `{ x, y }` points on two numeric axes, the primary tool for seeing correlation and spread between two variables. Provide named `series` of `{ x, y }` points and pick a `block` (1-4) variant plus a `size` preset; legend and grid auto-toggle per block unless overridden.

## Basic Usage

A single `Observations` series of 30 generated `{ x, y }` points scattered across the plane.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Thirty generated observations drawn as an XY scatter chart at the md preset.
```

## Ad Spend vs Revenue by Cohort

Two acquisition cohorts plotted as ad spend against attributed revenue to compare their return-on-spend clusters.

```example
file: examples/AdSpendVsRevenue.ts
html: examples/AdSpendVsRevenue.html
title: Ad Spend vs Revenue by Cohort
description: Enterprise and SMB cohorts drawn as hollow points to contrast steep versus flat revenue returns.
```

## Horsepower vs Fuel Economy

Engine horsepower plotted against highway fuel economy across a fleet, surfacing the classic negative correlation.

```example
file: examples/HorsepowerVsMpg.ts
html: examples/HorsepowerVsMpg.html
title: Horsepower vs Fuel Economy
description: Forty fleet vehicles drawn as filled points showing MPG falling as horsepower rises.
```

```api
```