Line of best fit
Authored by Stephen Langford
Mathematics
7th Grade
Used 3+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the name of the blue line drawn on the scatter diagram?
Line of best fit
Line of fast fit
Lion of best bit
Line of dust it
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you draw a line of best fit?
Join up all the points on the scatter diagram
Draw a line that is above all the points on the scatter diagram
Draw a line that is below all the points on the scatter diagram
Draw a line that is roughly in the middle of all the points, following their pattern
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which diagram shows the correct line of best fit for the scatter diagram?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which diagram shows the correct line of best fit for the scatter diagram?
5.
GRAPHING QUESTION
1 min • 1 pt
Draw the line of best fit on the scatter diagram.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can you use a line of best fit for?
To estimate the value of one of the quantities in the data
To see the future
To check for errors in the data
To see if there is any correlation
Answer explanation
Once the line is drawn, you can use it to estimate the value of a quantity by starting at a known value of the other quantity.
In the example shown, the line of best fit can be used to estimate ice cream sales when the temperature is 21. The estimate is 37 sales.
7.
FILL IN THE BLANKS QUESTION
30 sec • 1 pt
The scatter diagram shows Maths and Science test scores for a class of pupils.
Use the line of best fit to estimate the Science score for a pupil who scored 60 in the Maths test.
(a)
Answer explanation
Starting from 60 on the Maths axis, we go up to the line of best fit, then across to the Science axis, hitting the value 55.
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