Determining slope of zero from a graph positive

The video tutorial explains how to determine the slope of a horizontal line. It begins by discussing the nature of horizontal lines and the irrelevance of exact Y-axis intervals. The instructor emphasizes that the slope is determined by the change in Y coordinates over the change in X coordinates. Arbitrary points can be chosen on the line, as the slope remains zero due to the lack of vertical change. The tutorial concludes by reinforcing that the slope of a horizontal line is always zero, as there is no upward or downward change.

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