---
id: 5d8a4cfbe6b6180ed9a1c9f8
title: Part 27
challengeType: 0
dashedName: part-27
---
# --description--
The two scales you defined will be used to create the axes and lines. First is the y-axis, it will be a line with some labels on the left of the graph. Create a new `const` named `yAxis` and set it equal to `d3.axisLeft(yScale)`. This will use the information from the `yScale` variable to build the axis.
# --hints--
test-text
```js
assert(
typeof yAxis === 'function' &&
/yAxis\s*=\s*d3\.axisLeft\(\s*yScale\)/.test(code)
);
```
# --seed--
## --before-user-code--
```html
D3 Dashboard
```
## --seed-contents--
```html
```
# --solutions--
```html
```