Scatter plots, Scatter plots, relationships, and Trend relationships, and Trend
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Objective:
Learn to read and interpret scatter plots.
Learn to draw trend lines.
Scatter plots are used to investigate the relationship between two sets of
numbers.
A scatter plot with a A scatter plot with a POSITIVE RELATIONSHIPPOSITIVE RELATIONSHIP
• When 2 sets of data When 2 sets of data increase at the same increase at the same time, the sets show a time, the sets show a positive relationship. A scatter plot of a positive relationship slants upward to the right.
A scatter plot with a NEGATIVE RELATIONSHIP
When 1 set of data increases as the other decreases, the set shows a negative relationship. A scatter plot of a negative relationship slants downward to the right.
When 2 sets of data neither increase nor
decrease together, they show
no relationship
•When sets of data show a positive or negative relationship, you can draw a trend line to approximate the data.•By extending the trend line you can make predictions about the future.
Homework: Homework:
Scatter plotsDetermine whether each data set shows a positive, a negative, or no relationship.
Homework: Homework:
If you haven’t brought your M&M bag (regular size),
please bring it Monday/ Tuesday plus any materials you might want to use to decorate
your project next week.
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