Question

Alisha slides down a 120-foot slide at a rate of 10 feet per second. If x represents the time from when she starts the slide, and y represents how far she is from the bottom in feet, what does the x-intercept represent?

A.
The amount of seconds it takes Alisha to reach the end of the slide.
B.
The length of the slide.
C.
The distance Alisha has traveled when she is halfway down.
D.
There is not enough information.

Answer 1

A. The amount of seconds it takes Alisha to reach the end of the slide.

Explanation:

You want to know the meaning of the x-intercept when x is time from when Alisha starts sliding, and y is the distance from the bottom of the slide.

X-intercept

The x-intercept is the value of x when y = 0.

Y is the distance from the bottom of the slide, so it is zero when Alisha has reached the bottom.

X is the time Alisha has been sliding. The x-intercept will be the length of time Alisha has been sliding when she reaches the bottom of the slide.

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Additional comment

These questions about the meaning of a point on a graph can be answered by understanding what is being graphed and how the variables are defined. It is a reading comprehension question.

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