Drawing Lines of Best Fit on Scatter Graphs

What is the purpose of a line of best fit in a scatter graph?

• To draw a boundary around the data points

• To extend through the middle of the scatter plots approximately

• To highlight the origin point on the graph

• To connect all the data points directly

Tags

CCSS.8.EE.B.5

Does a line of best fit always have to pass through the origin?

• Yes, always

• It depends on the type of scatter graph

• No, it does not have to

• Only if the data suggests so

Tags

CCSS.8.SP.A.2

When drawing a line of best fit, what should be considered regarding the data points?

• All points must be below the line

• All points must be above the line

• The line should only touch the highest and lowest points

• There should be roughly the same number of plots above as below the line

Tags

CCSS.8.EE.B.5

How can a line of best fit be used after it is drawn?

• To draw a new scatter graph

• To change the steepness of the plots

• To erase unnecessary data points

• To estimate values based on the data

Tags

CCSS.8.EE.B.5

In which scenario is it impossible to draw a line of best fit?

• When the scatter plot shows a clear upward trend

• When the scatter plot shows a clear downward trend

• When all the data points are clustered together

• When there is no correlation in the scatter plot