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What’s the best way to use Instagram? When a user posts an image to Instagram, they often obsess over how many likes and comments it receives. However, it can be hard to know what strategies users can take to make their pictures more popular.

In this lesson, students use histograms, linear regressions, and r-squared values to debate the most effective strategies to gain Insta-fame...and the consequences of always having to smile for the camera.

### Students will

• Interpret the slope and intercept of a linear model in the context of the data
• Compare R2 values
• Distinguish between correlation and causation

### Before you begin

Students will interpret R-squared values in this lesson. If they aren't already familiar with that concept, you'll want to build in time to introduce it.