---
id: 5d8a4cfbe6b6180ed9a1c9f6
title: Part 25
challengeType: 0
dashedName: part-25
---
# --description--
The `year` values of your data will be used for the x-scale. Chain the `domain` function to `xScale` and pass it an array with the first and last years of your data.
# --hints--
test-text
```js
const domain = xScale.domain();
assert(domain.length === 2 && domain[0] === 2012 && domain[1] === 2020);
```
# --seed--
## --before-user-code--
```html
D3 Dashboard
```
## --seed-contents--
```html
```
# --solutions--
```html
```