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Lee always uses the y-axis as her vertical line when testing whether a graph represents a function. Why is this strategy flawed? A The y-axis is a horizontal line. B The y-axis is infinitely long. C The y-axis is exempted from the vertical line test. D The y-axis only tests whether x = 0 has been mapped to more than one y coordinate

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averagebloxyy

Answer: A

Step-by-step explanation: The correct answer is A: The y-axis is a horizontal line. The vertical line test is used to determine whether a graph represents a function. A graph represents a function if and only if no vertical line intersects the graph in more than one point. Therefore, using the y-axis as a vertical line when applying the vertical line test is flawed because the y-axis is a horizontal line and therefore cannot be used as a vertical line.

semsee45

Answer:

D)  The y-axis only tests whether x = 0 has been mapped to more than one y coordinate.

Step-by-step explanation:

The y-axis is a vertical line and intersects the x-axis (horizontal line) at the origin (0, 0) when both x and y are zero.

Vertical line test

A graph represents a function if and only if all vertical lines intersect the graph at most once.

Therefore, the strategy of using only the y-axis as the vertical line in the vertical line test is flawed because the y-axis only tests whether x = 0 has been mapped to more than one y-coordinate.

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