When All the Points in a Scatter Plot Lie Directly

question 13

Multiple Choice

When all the points in a scatter plot lie directly on the regression line of Y and X, then

• A) X has caused Y
• B) the correlation must equal 0
• C) the correlation cannot be calculated
• D) the correlation must equal +1.00

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Definitions:

Keystone Species

A pivotal species within an ecosystem that other species heavily rely on, whose absence would result in profound alterations to the ecosystem's composition.

Cryptic Coloration

Colors or markings that help some organisms hide from predators by blending into their physical surroundings. Compare with aposematic coloration.

Unpalatability

The quality or state of being unappetizing to eat or difficult to digest, often a defense mechanism in plants and animals against predators.

Potential Predators

Organisms that could potentially hunt and consume other organisms as their source of food.