Lesson 5
Describing Trends in Scatter Plots
Let’s look for associations between variables.
Problem 1
- Draw a line that you think is a good fit for this data. For this data, the inputs are the horizontal values, and the outputs are the vertical values.
- Use your line of fit to estimate what you would expect the output value to be when the input is 10.
Problem 2
Here is a scatter plot that shows the most popular videos in a 10-year span.
![A scatterplot, x, date, January 1 2007 to January 1 2019 by 2 years, y, views, billions. Points range from y = point 8, to 2 point 8 with no discernable pattern.](https://staging-cms-im.s3.amazonaws.com/LXc6bB2SEFoErNzTa8Qne17T?response-content-disposition=inline%3B%20filename%3D%228-8.6.B7.PP.videoviews.png%22%3B%20filename%2A%3DUTF-8%27%278-8.6.B7.PP.videoviews.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF37H2AMFB%2F20240722%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240722T133910Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=4b3b585e8af651ef9d4ed80bce3350224937d429deec2f5b92cc39feb7fe182d)
- Use the scatter plot to estimate the number of views for the most popular video in this 10-year span.
- Estimate when the 4th most popular video was released.
Problem 3
A recipe for bread calls for 1 teaspoon of yeast for every 2 cups of flour.
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Name two quantities in this situation that are in a functional relationship.
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Write an equation that represents the function.
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Draw the graph of the function. Label at least two points with input-output pairs.