---
id: 587d7fa8367417b2b2512bca
title: Change the Presentation of a Bar Chart
challengeType: 6
forumTopicId: 301481
dashedName: change-the-presentation-of-a-bar-chart
---
# --description--
The last challenge created a bar chart, but there are a couple of formatting changes that could improve it:
1) Add space between each bar to visually separate them, which is done by adding a margin to the CSS for the `bar` class
2) Increase the height of the bars to better show the difference in values, which is done by multiplying the value by a number to scale the height
# --instructions--
First, add a `margin` of 2px to the `bar` class in the `style` tag. Next, change the callback function in the `style()` method so it returns a value 10 times the original data value (plus the "px").
**Note**
Multiplying each data point by the *same* constant only alters the scale. It's like zooming in, and it doesn't change the meaning of the underlying data.
# --hints--
The first `div` should have a `height` of 120 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(0).css('height') == '120px' &&
$('div').eq(0).css('margin-right') == '2px'
);
```
The second `div` should have a `height` of 310 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(1).css('height') == '310px' &&
$('div').eq(1).css('margin-right') == '2px'
);
```
The third `div` should have a `height` of 220 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(2).css('height') == '220px' &&
$('div').eq(2).css('margin-right') == '2px'
);
```
The fourth `div` should have a `height` of 170 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(3).css('height') == '170px' &&
$('div').eq(3).css('margin-right') == '2px'
);
```
The fifth `div` should have a `height` of 250 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(4).css('height') == '250px' &&
$('div').eq(4).css('margin-right') == '2px'
);
```
The sixth `div` should have a `height` of 180 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(5).css('height') == '180px' &&
$('div').eq(5).css('margin-right') == '2px'
);
```
The seventh `div` should have a `height` of 290 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(6).css('height') == '290px' &&
$('div').eq(6).css('margin-right') == '2px'
);
```
The eighth `div` should have a `height` of 140 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(7).css('height') == '140px' &&
$('div').eq(7).css('margin-right') == '2px'
);
```
The ninth `div` should have a `height` of 90 pixels and a `margin` of 2 pixels.
```js
assert(
$('div').eq(8).css('height') == '90px' &&
$('div').eq(8).css('margin-right') == '2px'
);
```
# --seed--
## --seed-contents--
```html
```
# --solutions--
```html
```