Find the slope.?
Find the slope of the line passing through the points (1, –3) and (1, 5).
a)8
b)0
c)Undefined
d)1
Find the slope of any line perpendicular to the line through points (8, 15) and (2, 3).
a) -1/2
b) 2
c) -2
d) 1/4
Can someone explain how this is done?
Top 2 Answers
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First question, find the slope. slope is change in y value/ change in x value.
In this example, the change in y value is 5 – (-3) = 8
The change in x value is 0
the slope is 8/0 (undefined).
Second question: The slope of the orginal line is 12/6, so the slope of a perpendicular is -6/12 = -1/2
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The slope is how much the line changes vertically over the horizontal change.
Given the points (x1,y1) and (x2,y2), the slope of the line passing through the points is (y2-y1) / (x2-x1).
Given a line with slope a / b, the slope of a perpendicular line is -b / a.
For a better explanation, see the website shown below.
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