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Is the trend linear or non-linear?
Is the trend linear or non-linear?
Imagine using a highlighter to draw a band to cover as most of the points in your scatterplot.
Linear
Linear
Most points in the scatter graph can be covered with a straight band.
Non-linear
Non-linear
Most points in the scatter graph cannot be covered with a straight band (or the band is curved).
Describing the trend:
Describing the trend:
Linear Trend:
Linear Trend:
I notice that most of the points in my scatter graph lie in a straight band.
This means that the relationship between Variable 1 and Variable 2 is linear.
Non-linear Trend:
Non-linear Trend:
I notice that most of the points in my scatter graph do not lie in a straight band.
This means that the relationship between Variable 1 and Variable 2 is non-linear.
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