Mike and Rajiv plan an investigation to find out how running speed affects breathing rate. (i) Name the equipment they must use to measure their breathing rate. (ii) State one variable they need to change.
(iii) State one variable they need to keep the same.
(iv) Suggest one way they record and present their results.
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Answered by
6
Answer:
State one variable they need to keep the same.
(iv) Suggest one way they record and present their results.
Answered by
3
Answer:
The variable they need they need to keep the same is the speed
Explanation:
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