Understanding Line of Best Fit in DESMOS

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

• Create a scatter plot

• Input x and y values into a table

• Adjust the graph view

• Calculate the correlation coefficient

What tool in DESMOS allows you to adjust the view of your graph?

• The line tool

• The table tool

• The wrench tool

• The plus button

What happens to the scatter plot when you change the x and y values in the table?

• The plot disappears

• The plot automatically updates

• The plot remains unchanged

• The plot becomes a straight line

In DESMOS, how do you write the equation of the line of best fit?

• y1 = mx1 + b

• y = ax + b

• y1 ~ mx1 + b

• y = mx + b

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

• To denote a negative correlation

• To highlight the y-intercept

• To show that the line is an estimation

• To indicate an exact fit

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

• The x-intercept

• The correlation coefficient

• The y-intercept

• The slope

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

• The correlation coefficient

• The y-intercept

• The x-intercept

• The slope

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

• It determines the slope of the line

• It indicates the strength of the linear relationship

• It shows the y-intercept value

• It adjusts the graph view

What does a positive correlation indicate about the relationship between x and y values?

• As x increases, y decreases

• As x increases, y increases

• There is no relationship

• The relationship is non-linear

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

• A strong positive correlation

• A strong negative correlation

• No correlation

• A perfect correlation