Line of Best Fit

Front

What is a Line of Best Fit?

Back

A Line of Best Fit is a straight line that best represents the data on a scatter plot, showing the trend of the data points.

Tags

CCSS.8.EE.B.5

Front

How do you determine the Line of Best Fit on a scatter plot?

Back

You can determine the Line of Best Fit by visually inspecting the scatter plot and drawing a line that minimizes the distance between the line and all the data points.

Tags

CCSS.8.EE.B.5

Front

What does a positive slope in a Line of Best Fit indicate?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Tags

CCSS.8.EE.B.5

Front

What does a negative slope in a Line of Best Fit indicate?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Tags

CCSS.8.EE.B.5

Front

What does the correlation coefficient (r) represent?

Back

The correlation coefficient (r) measures the strength and direction of a linear relationship between two quantitative variables.

Tags

CCSS.HSS.ID.C.8

Front

What does an r value of -0.89 indicate?

Back

An r value of -0.89 indicates a strong negative linear relationship between the two variables.

Tags

CCSS.HSS.ID.B.5

Front

What is the purpose of using a Line of Best Fit in data analysis?

Back

The purpose is to make predictions about one variable based on the value of another variable.

Tags

CCSS.8.EE.B.5

Front

How can you use a Line of Best Fit to make predictions?

Back

You can use the equation of the Line of Best Fit to substitute values and predict the corresponding output.

Tags

CCSS.HSF.IF.A.2

Front

What is the equation of a line in slope-intercept form?

Back

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What does the y-intercept represent in a Line of Best Fit?

Back

The y-intercept represents the value of the dependent variable when the independent variable is zero.

Tags

CCSS.HSF.LE.B.5