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---
id: 5d8a4cfbe6b6180ed9a1c9ec
title: Part 15
challengeType: 0
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dashedName: part-15
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---
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# --description--
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The script at the top is the `data.js` file you added. I have placed it here so you can see the data and recommend taking a look at it. The second script is the one you just added and where you will build the rest of the project.
In the second script, create three `const` variables; `svgMargin` with a value of `70` , `svgWidth` with a value of `700` , and `svgHeight` equal to `500` . The first part of the dashboard will be a line graph. It will use these variables as its dimensions.
The line graph will have the years from your data variable across the bottom, and a scale on the left to show the numbers of followers. Each platform will have a line going across the graph that shows how many followers you had for each year.
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# --hints--
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test-text
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```js
assert(svgMargin === 70 & & svgWidth === 700 & & svgHeight === 500);
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```
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# --seed--
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## --before-user-code--
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```html
<!DOCTYPE html>
< html >
< head >
< title > D3 Dashboard< / title >
< style >
body {
background-color: #ccc ;
padding: 100px 10px;
}
.dashboard {
width: 980px;
height: 500px;
background-color: white;
box-shadow: 5px 5px 5px 5px #888 ;
margin: auto;
display: flex;
align-items: center;
}
< / style >
< / head >
< body >
< div class = "dashboard" > < / div >
< / body >
< / html >
```
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## --seed-contents--
```html
< script >
const data = [
{ year: 2012, followers: { twitter: 2594, tumblr: 401, instagram: 83 }},
{ year: 2013, followers: { twitter: 3049, tumblr: 440, instagram: 192 }},
{ year: 2014, followers: { twitter: 3511, tumblr: 415, instagram: 511 }},
{ year: 2015, followers: { twitter: 3619, tumblr: 492, instagram: 1014 }},
{ year: 2016, followers: { twitter: 4046, tumblr: 543, instagram: 2066 }},
{ year: 2017, followers: { twitter: 3991, tumblr: 701, instagram: 3032 }},
{ year: 2018, followers: { twitter: 3512, tumblr: 1522, instagram: 4512 }},
{ year: 2019, followers: { twitter: 3274, tumblr: 1989, instagram: 4715 }},
{ year: 2020, followers: { twitter: 2845, tumblr: 2040, instagram: 4801 }}
];
< / script >
< script >
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< / script >
```
# --solutions--
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```html
< script >
const data = [
{ year: 2012, followers: { twitter: 2594, tumblr: 401, instagram: 83 }},
{ year: 2013, followers: { twitter: 3049, tumblr: 440, instagram: 192 }},
{ year: 2014, followers: { twitter: 3511, tumblr: 415, instagram: 511 }},
{ year: 2015, followers: { twitter: 3619, tumblr: 492, instagram: 1014 }},
{ year: 2016, followers: { twitter: 4046, tumblr: 543, instagram: 2066 }},
{ year: 2017, followers: { twitter: 3991, tumblr: 701, instagram: 3032 }},
{ year: 2018, followers: { twitter: 3512, tumblr: 1522, instagram: 4512 }},
{ year: 2019, followers: { twitter: 3274, tumblr: 1989, instagram: 4715 }},
{ year: 2020, followers: { twitter: 2845, tumblr: 2040, instagram: 4801 }}
];
< / script >
< script >
const svgMargin = 70,
svgWidth = 700,
svgHeight = 500;
< / script >
```
