No, never.
Horizontal lines always have a slope of zero. (i.e completely flat, level surfaces have a slope of zero). However a line does not have to have a slope of zero in order to be a line.
If a line on a graph is rising as it goes from left to right, it has a positive slope. If it is falling from left to right (or rising from right to left) it has a negative slope. If it is horizontal, it has a slope of zero.
The slope of the graph of a direct variation is always positive.
Yes
As a line with a positive slope gets closer to vertical, its slope value increases and approaches infinity. The slope is defined as the rise over run; as the run (horizontal change) approaches zero, the slope becomes steeper. Ultimately, a perfectly vertical line has an undefined slope, as it cannot be expressed as a ratio of rise to run.
Horizontal lines always have a slope of 0.
Yes. There is no positive or negative rise to generate a slope, and it cannot have a run of zero length.
Horizontal lines always have a slope of zero. (i.e completely flat, level surfaces have a slope of zero). However a line does not have to have a slope of zero in order to be a line.
If a line on a graph is rising as it goes from left to right, it has a positive slope. If it is falling from left to right (or rising from right to left) it has a negative slope. If it is horizontal, it has a slope of zero.
No because the slope of a line can be positive or negative
The slope of the graph of a direct variation is always positive.
No.
Horizontal lines have a slope of 0.
Not always because it can also be negative
The slope of a horizontal line is zero.
No, the slope of a horizontal line is 0. The slope of a vertical line is undefined.
No. The slope of a horizontal line is zero. The slope of a vertical line is undefined.