B. img alt="" src="images/Prin_9780307945723_epub_202_r1.jpg"/> C. img alt="" src="images/Prin_9780307945723_epub_203_r1.jpg"/> D. img alt="" src="images/Prin_9780307945723_epub_204_r1.jpg"/> E. img alt="" src="images/Prin_9780307945723_epub_205_r1.jpg"/>" />

SAT Subject Biology Practice Question 303: Answer and Explanation

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Question: 303

13. Cardiac output (the amount of blood pumped out of the heart in one minute) and blood pressure are directly proportional. Which of the following graphs best depicts the relationship between cardiac output and blood pressure?

A. img alt="" src="images/Prin_9780307945723_epub_201_r1.jpg"/>
B. img alt="" src="images/Prin_9780307945723_epub_202_r1.jpg"/>
C. img alt="" src="images/Prin_9780307945723_epub_203_r1.jpg"/>
D. img alt="" src="images/Prin_9780307945723_epub_204_r1.jpg"/>
E. img alt="" src="images/Prin_9780307945723_epub_205_r1.jpg"/>

Correct Answer: D

Explanation:

D Relationships that are directly proportional have linear graphs with a positive slope.

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