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Example: What is the relationship here? Is the data on the x-axis related to the data on the y-axis? Is there a relationship between height and shoe size?
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11.2 Scatter Plots
Scatter Plots
A scatter plot is a graph that relates two groups of data.The purpose of a scatter plot is to show how (or if) the data is related.
Example:
The purpose of a scatter plot is to show how (or if) the data is related.What is the relationship here? Is the data on
the x-axis related to the data on the y-axis?
Is there a relationship between height and shoe size?
There are 3 types of relationships.
The purpose of a scatter plot is to show how (or if) the data is related.A positive correlatio
n
A negative correlatio
n
No correlatio
n This
means as x is
increasing, y is also
increasing
This means as
x is increasing,
y is decreasing
This means
there is no relationship between
x and y
A positive correlation as x is increasing, y is also increasing
A negative correlation as x is increasing, y is decreasing
No correlation No relation between x and y
Peanut butter
When making a scatter plot, all the regular graphing rules applied.
What type of correlation do you think the following data sets have?
Study time, gradesAge of car, value of car
Height, intelligenceShoe size, salary
Miles per gallon, gas expenseWindchill, ice cream sales