The graph of a linear function is shown.

which word describes the slope of the line?

positive
negative
zero
undefined

Positive is a line that increases those most commonly go from the bottom left corner to the top right.
Negative is a line that decreases those most commonly go from the top left to the bottom right.
Zero is a line that is horizontal which goes from left to right.
Undefined is a vertical line which goes from top to bottom

For this line it would be a Zero slope line because it goes from left to right.

Hope this helps!
 

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