A slope chart is a type of visualization that shows the change in values of a variable between two points in time using diagonal lines. A slope chart can also show the ranking or order of the values at each point in time using vertical axes.

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To create a slope chart in Tableau, follow these steps:

1. Connect to your data source and drag the variable you want to use as the lines to the Detail mark. For example, if you want to create a slope chart of sales by product category between two years, drag Product Category to Detail.
2. Drag the measure you want to use as the values of the lines to the Rows shelf. For example, drag Sales to Rows.
3. Drag another variable you want to use as the time dimension to the Columns shelf. For example, drag Year(Order Date) to Columns.
4. Change the mark type from Automatic to Line. This will create a slope chart with different slopes based on the values of the measure between two points in time.
5. Optionally, you can add labels, tooltips, filters, legends, titles, and other formatting options to enhance your visualization.

You have now created a slope chart in Tableau!

A slope chart can be useful for businesses in many ways. Here are some examples of how businesses can benefit from using this type of visualization:

• A slope chart can help show the change or difference in values of a variable between two points in time across categories or groups using visual cues such as angle and direction. For example, a business can use a slope chart to show sales by product category between two years and see which products have increased or decreased their sales over time.
• A slope chart can help show the ranking or order of values of a variable at each point in time across categories or groups using visual cues such as position and length. For example, a business can use a slope chart to show sales by product category between two years and see which products are leading or lagging behind others at each year.
• A slope chart can help show correlations or relationships between two variables across categories or groups using visual cues such as color or shape. For example, a business can use a slope chart to show sales by product category and region between two years and see how they are related.

A slope chart is one of the most powerful types of visualization that businesses can use to compare and contrast their data over time.

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Here are some interview questions on this topic:

• What is a slope chart and when would you use it?
• How do you create a slope chart in Tableau?
• What are some advantages and disadvantages of using a slope chart?
• How do you interpret and analyze a slope chart?
• How do you customize and format a slope chart in Tableau?

Here are some data analyst technical round questions on this topic:

• How do you calculate the percentage change in values of a variable between two points in time using Tableau calculated fields?
• How do you sort the values of a variable at each point in time by ascending or descending order using Tableau sorting options?
• How do you add reference lines or bands to show benchmarks or targets for values of a variable at each point in time using Tableau analytics pane?
• How do you filter out outliers or extreme values from your data set using Tableau filters shelf?
• How do you test for statistical significance or correlation between two variables using Tableau trend lines option?

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