Line of Best Fit

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot. It shows the trend of the data points.

Tags

CCSS.8.EE.B.5

Front

How do you find the line of best fit using a graph?

Back

To find the line of best fit, plot the data points on a graph and draw a line that best represents the trend of the points, minimizing the distance from all points to the line.

Front

What does the slope of the line of best fit represent?

Back

The slope of the line of best fit represents the rate of change between the two variables in the data set.

Tags

CCSS.8.EE.B.5

Front

What does the y-intercept of the line of best fit indicate?

Back

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

Tags

CCSS.HSF.LE.B.5

Front

How can you use the line of best fit to make predictions?

Back

You can use the line of best fit to predict the value of the dependent variable for a given value of the independent variable by substituting the value into the equation of the line.

Front

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

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables using dots to represent the data points.

Front

What does a positive slope indicate about the relationship between two variables?

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 indicate about the relationship between two variables?

Back

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

Tags

CCSS.8.EE.B.5

Front

What is the purpose of the line of best fit in data analysis?

Back

The purpose of the line of best fit is to summarize the relationship between two variables and to make predictions based on that relationship.

Tags

CCSS.8.EE.B.5