Exploring Scatterplots and Trend Lines with TI-73

Mr. Boric demonstrates how to create a scatter plot and a trend line using a TI 73 calculator. The tutorial covers entering data, plotting a scatter plot, generating a trend line using linear regression, and using the trend line to make predictions. The video emphasizes the importance of accurate data entry and explains the limitations of trend lines for long-term predictions.

What is the first step in creating a scatter plot on the TI-73 calculator?

• Zooming in on the data

• Turning on the plot function

• Calculating the trend line

• Entering the data into the lists

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Why is it important for the number of values in the first list to match the number of values in the second list?

• To calculate the correct trend line

• To avoid an error later on

• To make the data entry process easier

• To ensure the plot function works

What should you do after entering the data to create a scatter plot?

• Set up the table

• Zoom in on the data

• Calculate the trend line

• Turn on the plot function

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Why might the scatter plot initially appear empty after graphing?

• The plot function is not turned on

• The data is not entered correctly

• The graph is not zoomed in on the data points

• The calculator is malfunctioning

Which zoom option should you use to view the scatter plot data clearly?

• Zoom Fit

• Zoom Stat

• Zoom Out

• Zoom In

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CCSS.8.SP.A.1

What is the purpose of calculating the trend line on the TI-73 calculator?

• To find the average of the data

• To create a scatter plot

• To determine the line of best fit

• To zoom in on the data

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What does the 'a' in the linear regression equation ax + b represent?

• The correlation coefficient

• The x-value

• The slope

• The y-intercept

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How can you graph the trend line on the TI-73 calculator after calculating it?

• By manually entering the equation

• By using the copy and paste function

• By turning on the plot function

• By zooming in on the data

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What is the trend line used for in data analysis?

• To enter data into the calculator

• To make long-term predictions

• To calculate the average

• To make short-term predictions

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Why are trend lines not accurate for long-term predictions?

• They require constant updates

• They are not designed for future projections

• They only work for small datasets

• They are based on limited data

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