When creating a chart, you want to tell the viewer what data they are viewing. To do this, you need to label the axis.
## Scale Title Configuration
The scale label configuration is nested under the scale configuration in the `scaleLabel` key. It defines options for the scale title. Note that this only applies to cartesian axes.
| `labelString` | `string` | `''` | The text for the title. (i.e. "# of People" or "Response Choices").
| `lineHeight` | <code>number|string</code> | `1.2` | Height of an individual line of text (see [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/line-height)).
It is also common to want to change the tick marks to include information about the data type. For example, adding a dollar sign ('$'). To do this, you need to override the `ticks.callback` method in the axis configuration.
The third parameter passed to the callback function is an array of labels, but in the time scale, it is an array of `{label: string, major: boolean}` objects.