ANSWER KEY
Make Scatter plots and
Determine Correlation CW
Determine the type of correlation for the given situations..
1.
2.
3.
Number
of people
in a
carpool
Size of
Planet
Amount of
CO2
Car speed
Gas Prices
Distance from Sun
Correlation: NEGATIVE
Correlation: NONE
Correlation:
4. Playing time and number of points scored during a basketball game.
POSITIVE
Correlation: POSITIVE
5. Your height and month of birth. Correlation: NONE
6. The price of gas and the amount of people driving on vacation. Correlation NEGATIVE
7. The number of chickens on a farm and the number of eggs produced. Correlation: POSITIVE
8. Your shoe size and the number of book you read in a year. Correlation: NONE
9. Size of household and number of pounds of garbage produced. Correlation: POSITIVE
10. The amount of pollutants in the water and the amount of fish in a pond. Correlation: NEGATIVE
11. A person’s foot length and the amount of time spent reading. Correlation: NONE
12. The amount of candy eaten and the number of cavities. Correlation: POSITIVE
13. The outside temperature and the number of hot chocolate drinks sold. Correlation: NEGATIVE
* Graphs will appear different with each student so just check that the dots make a similar pattern, that each axis is labeled,
broken x & y a-xis used appropriately, and the intervals are consistent.
14. Make a scatter plot.
Study Time
(min)
Test Score
60
92
55
79
10
65
75
87
15
23
90
95
120
98
40
59
100
80
Test Score
60
40
20
0
20
40
60
Study Time
Correlation: POSITIVE
80
100 120
15. Make a scatter plot.
Year
Number of
farms
(in thousands)
450
1980
425
400
1985
402
1990
389
1995
367
2000
345
2005
322
2010
284
Number of
farms (in
thousands)
350
300
250
1980
1985 1990 1995
2000 2005 2010
Year
Correlation: NEGATIVE
16. Make a scatter plot.
Area (square
miles)
Number of
species of
birds
113
69
34
140
21
76
95
144
48
92
113
277
125
236
250
200
Species
of Birds
150
100
50
0
Correlation: NONE
25
50
75
100
125
Area (square miles)
17. Make a scatter plot.
Annual
Rainfall (in)
Weight of
Pumpkin (lb)
43
35
38
31
47
40
36
198
196
192
195
190
199
197 194
196
194
Weight of
Pumpkin
192
190
Correlation: POSITIVE
0
30
35
40
45
Annual Rainfall (in)
50
150