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## What's the best way to use Instagram? 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.

### REAL WORLD TAKEAWAYS

• How one uses Instagram may affect how many interactions and followers they accumulate.
• It may also affect their well-being.

### MATH OBJECTIVES

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

Appropriate most times as students are developing conceptual understanding. Algebra 2
Bivariate Statistics Algebra 2
Bivariate Statistics
Content Standards S.ID.6 Represent data on two quantitative variables on a scatter plot, and describe how the variables are related. (a) Fit a function to the data; use functions fitted to data to solve problems in the context of the data. Use given functions or choose a function suggested by the context. Emphasize linear, quadratic, and exponential models. (b) Informally assess the fit of a function by plotting and analyzing residuals. (c) Fit a linear function for a scatter plot that suggests a linear association. S.ID.7 Interpret the slope (rate of change) and the intercept (constant term) of a linear model in the context of the data. S.ID.9 Distinguish between correlation and causation.
Mathematical Practices MP.3 Construct viable arguments and critique the reasoning of others. MP.4 Model with mathematics. MP.5 Use appropriate tools strategically. MP.6 Attend to precision. MP.7 Look for and make use of structure.