Yes, it can be the slope of an infinite number of lines. As long as the y-value goes down one for every time the x-value increases by one, the line has a slope of -1.
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The line perpendicular to a line with a slope of 1/5 has a slope of -5.
The slope of a line perpendicular to one with slope m is -1/m. So for a line with slope 1/7, any line perpendicular to it will have: slope = -1 / (1/7) = -7
If we call the slope m we can say that the slope of the perpendicular line is -1/m In this case as the slope, m, is 13 the slope of the perpendicular is -1/13 or -0.07692307692
line in data is y=-2X+6 The perpendicular line will have a slope of = +1/2 Note : m X m' = -1 , m= slope of line 1 ; m'= slope of perpendicular line to line 1
That line is vertical. Its slope is "undefined".