Casey and Mark Are Running a Race at Constant Speeds

question 183

Multiple Choice

Casey and Mark are running a race at constant speeds. The graph below shows the distance d (in miles) they have traveled since they started the race at time t (in minutes) . Which one of the following statements is true?

• A) Not enough information
• B) Mark is running faster than Casey.
• C) Casey is running at 0.23 mph while Mark is running at 0.31 mph.
• D) Casey is running at 4.3 mph while Mark is running at 3.2 mph.
• E) Casey and Mark are both traveling at the same constant speed.

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Definitions:

Artificial Circumstances

Situations or environments that are created or manipulated by humans, rather than occurring naturally.

Experimental Research

A scientific method that seeks to determine cause-and-effect relationships by manipulating one variable while keeping others constant to observe the effects on the manipulated variable.

Cause-And-Effect

The principle that everything happens due to specific reasons, and that an action (cause) results in a certain outcome (effect).

Control Group

The control group in an experiment is the group that does not receive the experimental treatment, serving as a baseline to compare the effects of the treatment.