Writing Linear Equations Worksheet Page 20
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24For example, the fitted line on the scatter
plot at the right can be used to predict that
about 25 trees will be sold at $125 each.
Using the same scatter plot,
1.
How much will 15 trees be sold for?
2.
How many trees will be sold for about $25?
Make a Scatter Plot
a.
Make a scatter plot of the data in the table.
X
1
1.5
2
2
3
3.5
4
Y
3
1
1
-0.5
-1
-0.5
-2
b.
Describe the correlation of the data:
Using a Line of Fit to Model Data
Step 1:
Make a _________________ of the data.
Step 2:
Decide whether the data can be modeled by a _________.
Step 3:
Draw a line that appears to _____ the data closely. There should be
approximately as many points _________ the line as below it.
Step 4.
Write an equation using _______ points on the line. The points do not have to
represent actual data pairs, but they must lie on the line of fit.
20
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