Unit 8 · Class 8 IB MYP · MCQ Test
Bivariate Data MCQ Test — Class 8 IB MYP
Practice 10 multiple-choice questions with instant answer reveal and explanations.
Bivariate Data — MCQ Questions
1What does a scatter plot show?
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Answer: The relationship between two variables
Hint: A scatter plot uses two axes for two different variables.
Solution:
A scatter plot displays pairs of data to show potential relationships between two variables.
2If points on a scatter plot trend upward from left to right, the correlation is:
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Answer: Positive
Hint: Upward means both variables increase together.
Solution:
An upward trend indicates positive correlation.
3If points trend downward from left to right, the correlation is:
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Answer: Negative
Hint: Downward trend means one increases while the other decreases.
Solution:
A downward trend indicates negative correlation.
4What is the line of best fit?
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Answer: A line that best represents the trend
Hint: It doesn't have to pass through every point.
Solution:
The line of best fit minimises the overall distance to all data points.
5No pattern in a scatter plot means:
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Answer: No correlation
Hint: Random scatter = no relationship.
Solution:
Points scattered randomly indicate no correlation.
6The independent variable is usually placed on the:
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Answer: x-axis
Hint: Convention places the cause on x.
Solution:
By convention, the independent variable goes on the x-axis.
7A correlation coefficient of \(r = 1\) indicates:
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Answer: Perfect positive
Hint: r = 1 is the maximum positive value.
Solution:
r = 1 means all points lie exactly on a line with positive slope.
8A correlation coefficient of \(r = 0\) indicates:
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Answer: No linear correlation
Hint: Zero means no linear relationship.
Solution:
r = 0 means there is no linear relationship between the variables.
9Each point on a scatter plot represents:
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Answer: Two variables for one observation
Hint: Each point has an x and y value.
Solution:
Each point is a pair of measurements from one observation.
10Height and weight typically have what type of correlation?
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Answer: Positive
Hint: Taller people tend to weigh more.
Solution:
As height increases, weight tends to increase too.
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Tips for Bivariate Data MCQs
- 1Read each question carefully and identify what is being asked before looking at the options.
- 2Try to solve the problem mentally or on paper first, then match your answer with the options.
- 3Use elimination — rule out clearly wrong options to improve your chances even when unsure.
- 4Check units, signs, and edge cases — these are common traps in Bivariate Data MCQs.
- 5Review your mistakes after completing the test to build lasting understanding.
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