HSA 2009 Biology Item 51print

HSA 2009 Biology Item 51

CID
CID4d1500c535e08f70a08b641adbb0bb4d
itemNum
51
initialLetter
A
itemType
SR
itemAnswerKey
2
itemMaxScorePoints
1
origNum
65

Use the information and the chart below to answer Numbers 51 and 52.

Use the information and the chart below to answer the following item.

Several students are conducting an experiment to test the effect of exercise on heart rate. Students do 20 sit-ups in one minute of exercise. The data chart below shows the heart rate at one-minute intervals for each student.

Which of these is the dependent variable?

  1. time
  2. heart rate
  3. type of exercise
  4. number of sit-ups

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