Name
Date
Period
3. A study was made of endangered birds to see if their populations we...
Name
Date
Period
3. A study was made of endangered birds to see if their populations were increasing by being
protected from hunters. Scientists went out into the field every ten years and counted the
number of Whooping Crane, California Condor, and Black Swans they found in their spring
feeding grounds. Review the data below and construct the appropriate graph following all
graphing guidelines
Years
Bird Species
1950
1960
1970
Whooping Crane
24
41
78
California Condor
76
43
20
Black Swan
56
58
57
a. Explain what type of graph you will use and your reasons for using this type of graph.
Line araph because
H shows the #'s change
over time
b. What is the dependent variable?
# of Birds
C. What is the independent variable?
The Birds species
d. Looking at your graph, what conclusions can you draw about the Whooping Crane
population?
e. Looking at your graph, what conclusions can you draw about the California Condor
population?
f. Looking at your graph, what conclusions can you draw about the Black Swan population?
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