Exploring Scatter Plots and Regression Analysis

What is the purpose of Mr. Tarrou's video?

• To teach basic arithmetic operations.

• To explain the history of the TI-NSPIRE calculator.

• To compare different types of calculators.

• To demonstrate how to use a TI-NSPIRE for linear regression and residual plots.

Which variable should be placed on the x-axis when creating a scatter plot?

• The constant variable

• The dependent variable

• The explanatory variable

• The response variable

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

• Adding a new document

• Entering the y-values

• Calculating the regression line

• Saving the document

How do you add a new page for making a graph on the TI-NSPIRE?

• Pressing Control > Page

• Pressing Menu > Add Page

• Pressing Shift > Graph

• Pressing Alt > New

What menu options do you select to show the linear regression line?

• Menu > Data > Regression > Show Line

• Menu > Analyze > Graph > Show Linear Regression Line

• Menu > Graph > Regression > Show Line

• Menu > Analyze > Regression > Show Linear Regression Line

How can you obtain the correlation values (r and r squared) on the TI-NSPIRE?

• By guessing the values

• By using a different calculator

• By manually entering the values

• By calculating the regression line on the first page

What is the purpose of squaring the residuals in a residual plot?

• To minimize the sum of the squares

• To ensure the sum of residuals is zero

• To make the residuals negative

• To make the residuals positive

What indicates that the original graph was indeed linear in a residual plot?

• A diagonal line

• A clear pattern

• A random horizontal band

• A vertical line

What should you do if you want to save your work on the TI-NSPIRE?

• Press Alt > Save

• Press Menu > Save

• Press Control > Save

• Close the document and select 'Yes' when prompted to save

Why is it beneficial for students to save their data on the TI-NSPIRE?

• To share data with friends

• To avoid re-entering data for related questions

• To print the data

• To use the data in other subjects