Understanding Line of Best Fit in DESMOS

What is the first step in finding the line of best fit in DESMOS?

• Adjust the view using the wrench tool

• Write the equation in slope-intercept form

• Create a scatter plot

• Input x and y values into a table

How can you adjust the view of the scatter plot in DESMOS?

• By changing the color of the plot

• By adding more data points

• By using the wrench tool to control x and y values

• By changing the background color

What form is used to write the equation of the line of best fit?

• Slope-intercept form

• Standard form

• Point-slope form

• Quadratic form

What is the purpose of using an approximate equal sign in the equation?

• To indicate an exact fit

• To change the slope of the line

• To show that the line is an estimation

• To make the equation more complex

What does the 'm' represent in the equation y = mx + b?

• The correlation coefficient

• The x-intercept

• The slope

• The y-intercept

What is the role of the 'b' in the equation y = mx + b?

• It is the correlation coefficient

• It is the y-intercept

• It represents the slope

• It is the x-intercept

What is the significance of the correlation coefficient 'r'?

• It indicates the strength of the linear relationship

• It determines the color of the line

• It represents the slope of the line

• It shows the number of data points

What does a correlation coefficient close to 1 or -1 indicate?

• A weak linear relationship

• A strong linear relationship

• No linear relationship

• A quadratic relationship

If the correlation coefficient is close to zero, what does it mean?

• There is a strong linear relationship

• There is no correlation between the variables

• The data points form a perfect line

• The slope is zero

What does a positive correlation coefficient indicate about the data?

• The data forms a horizontal line

• The data has a positive trend

• The data has a negative trend

• The data points are scattered randomly