Name
Date
Class
Variables and Patterns
Check Up 1 for use after Investigation 1
Total Number of Knee Bends
1. Stefan did an experiment similar to the jumping jack exercise. He
collected data on the number of deep knee bends a person could do in
2 minutes. The graph below shows his data.
80
Deep Knee Bends
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100 110 120
Time (seconds)
a. What are the two variables?
b. Make a table of Stefan’s data.
c. Describe in detail the pattern of how the number of deep knee bends
changes as time increases.
d. From Stefan’s data, estimate the number of knee bends he did in
25 seconds and in 65 seconds. Explain how you made the estimate.
1
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Name
Date
Class
Variables and Patterns
Check Up 1 (continued)
2. The table shows some data Anita collected while walking.
Anita’s Walk
Time (minutes)
0
5
10
15
20
25
30
Distance (miles)
0
0.5
1
1.25
1.5
1.75
1.8
a. What are the two variables?
b. Graph the data on the axes below.
Anita’s Walk
2.5
2.25
Distance (in miles)
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
0
5
10
15
20
Time (in minutes)
25
30
c. In what time periods did Anita make the most progress?
How does this show up in the table?
How does this show up in the graph?
d. In what time periods did Anita make the least progress?
How does this show up in the table?
How does this show up in the graph?
2
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