Figure 2-19 in the Following Graph the X-Axis Shows the Number of Number

question 15

Multiple Choice

Figure 2-19
In the following graph the x-axis shows the number of times a commuter rail train stops at a station per hour and the y-axis shows the number of commuter rail passengers per hour.
Commuter Rail Passengers by Frequency of Service
-Refer to Figure 2-19.Which of the following conclusions should not be drawn from observing this graph?

• A)There is a positive correlation between the frequency of service and the number of passengers.
• B)When there are 5 stops per hour,there are approximately 200 passengers.
• C)More stops per hour is associated with more passengers per hour.
• D)No other factors besides the frequency of service affect the number of passengers.

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Definitions:

Pulmonary Semilunar Valve

A heart valve that is a semilunar valve. It is situated between the right ventricle and the pulmonary trunk.

Right Ventricle

The lower right chamber of the heart that receives deoxygenated blood from the right atrium and pumps it into the lungs via the pulmonary artery.

Pulmonary Semilunar Valve

A valve in the heart located between the right ventricle and the pulmonary artery, preventing backflow of blood into the heart.

Pulmonary Artery Trunk

The main vessel that carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.