Line of best fit
for 8th grade
Identify which of the lines is closest to being a line of best fit for the data
Scatter graphs: line of best fit
Scatter graphs use points to represent values that correlate the relationship between two variables. The scatter graph will indicate the degree to which the two variables are correlated (linked or related). If the variables are correlated, you will be able to draw a line of best fit. The more strongly two variables are correlated, the more closely the points will intersect the line of best fit. We are mainly concerned with linear correlation in this topic - the line of best fit is a straight line.
Drawing lines of best fit involves trying to pass the straight line through as many points as possible, with the remaining points being evenly distritbuted above and below the line.
One of the benefits of being able to draw a line of best fit is that it enables us to predict values for one of the variables that we don't have a data point for.
In this topic you are asked to decide which of the given lines is the best fit for the data points provided. The lines are labelled as A, B and C. We have included a few curved lines too.
Below is a table showing the first 6 question answer pairs for the topic "Line of best fit" as used in the lessons for this topic. Our games and tests for the topic use these 6 items plus 10 additional question answer pairs.
The topic "Line of best fit" is in the category Statistics for 8th grade (ages 13 to 14).
Revise 'Line of best fit' with one of our games for 8th grade
Each of our math topics for secondary are made up of between 6 and 20 question and answer pairs (both the written form and a robot voice speaking those questions and answers). Each topic can be used with all the activities on the site.
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