Question

What could be explained from the straight horizontal line observed at the beginning and end of the graph?

Answer 1

The graph of a relation of the form y = 5 is a line parallel to the x-axis because the y value never changes.  

A line parallel to the x-axis is called a horizontal line.

The graph of a relation of the form x = 5 is a line parallel to the y-axis because the x value never changes.

A line parallel to the y-axis is called a vertical line.

Answer 2

Answer:

The graph of a relation of the form Y=5 is a line parallel to the X-axis because the Y value never changes. A line parallel to the X-axis is called a horizontal line. The graph of a relation of the form

X=5 is a line parallel to they Y-axis because the X value naver changes.

A line parallel to the Y-axis called a vertical line.

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