Positive, Negative & No -Correlations

Front

What is a positive correlation?

Back

A positive correlation is a relationship between two variables where, as one variable increases, the other variable also increases.

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What is a negative correlation?

Back

A negative correlation is a relationship between two variables where, as one variable increases, the other variable decreases.

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What does no correlation mean?

Back

No correlation means there is no predictable relationship between two variables; changes in one variable do not affect the other.

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How can you identify a positive correlation in a scatter plot?

Back

In a scatter plot, a positive correlation is identified by points that trend upwards from left to right.

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How can you identify a negative correlation in a scatter plot?

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In a scatter plot, a negative correlation is identified by points that trend downwards from left to right.

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What does a scatter plot with no correlation look like?

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A scatter plot with no correlation shows points that are randomly scattered without any discernible pattern.

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What is a trend line in a scatter plot?

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A trend line is a straight line that best represents the data points in a scatter plot, indicating the general direction of the data.

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How do you use a trend line to make predictions?

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You can use a trend line to predict values by extending the line and finding where it intersects with the value of interest.

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What is an example of a positive correlation in real life?

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An example of a positive correlation is the relationship between hours studied and test scores; generally, more study time leads to higher scores.

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What is an example of a negative correlation in real life?

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An example of a negative correlation is the relationship between the amount of exercise and body weight; typically, more exercise leads to lower body weight.