Scenario
Yawning is a reflexive action that is often associated with sleepiness. When a person yawns, the mouth opens, and a longer than normal breath of air is inhaled, followed by a longer than normal exhalation. Hypothesizing that yawning has a regulatory mechanism similar to breathing, scientists conducted an experiment on college students to test the effect of existing carbon dioxide levels on yawning.
-Draw a graph that shows a relationship between carbon dioxide and yawning that supports the hypothesis of the scientists. To graph their results, the scientists would plot the ________.

Question

Quizplus · Accepted Answer

The level of carbon dioxide is the independent variable, which is typically plotted on the x-axis to observe its effect on the dependent variable, which in this case is the number of yawns.

Scenario Yawning Is a Reflexive Action That Is Often Associated with with Sleepiness