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Find the slope of the line that passes through (-4,-8) and (-4,2).

2007-07-24 02:19:48 · 9 answers · asked by mathmakesmecrazy 1 in Science & Mathematics Mathematics

9 answers

m = (2 + 8) / (- 4 + 4) = 10 / 0
Which is not defined.
This is a vertical line that passes thro` the given points.
It is the line x = - 4

2007-07-24 06:18:54 · answer #1 · answered by Como 7 · 0 0

The slope of two given points is the ratio of the change in y over the change in x:

2 - -8 / -4 - -4 =

10 / 0 = 0, so the slope is undefined

Notice the x term is the same in both coordinates. The line is vertical, therefore has an undefined slope.

2007-07-24 09:24:15 · answer #2 · answered by Mitchell . 5 · 0 1

The slope is the difference in the change of y divided by the difference in the change of x. In the problem this equals (-8-2) divided by (-4 - (-4)). Of course, -4 - (-4) is zero, so the slope is infinite. This indicated the line is vertical and perpendicular to the X axis at the point (-4,0).

2007-07-24 09:26:04 · answer #3 · answered by Roger S 7 · 0 1

first use the slope form formula
(Y2-Y1)/ (X2-X1)
= (2+8) / (-4+4) = 10/0
This number is mathematically undefined because it is divided by zero. Furthermore, this line is a vertical line, so it does not have a slope because it does not have a raise and run.

2007-07-24 09:40:07 · answer #4 · answered by Shelly 1 · 0 1

slope = (2+8) / (-4 + 4) = 10 / 0 . . . infinity
angle is 90 degrees w/ horizontal

2007-07-24 09:26:56 · answer #5 · answered by CPUcate 6 · 1 1

slope=(2-(-8))/(-4-(-4))
10/0=infinity

line x=-4
it is perpendicular to x axis.

2007-07-24 09:23:40 · answer #6 · answered by iyiogrenci 6 · 1 1

P(-4,-8);Q(-4,2).PQ is parallel to y-axis.so perpendicular to X-axis
slope of PQ=DY/DX=10/0=infinite

2007-07-24 09:28:27 · answer #7 · answered by Anonymous · 1 1

slope=(y1-y2)/(x1-x2)
=(-8-2)/(-4-(-4))
=-10/0
the slope is undefined so the line is parallel to y axis

2007-07-24 09:36:03 · answer #8 · answered by Anonymous · 0 1

from point, X= -4.0000 Y= -8.0000 Z= 0.0000
to point, X= -4.0000 Y= 2.0000 Z= 0.0000
Length = 10.0000, Angle in XY Plane = 90
Delta X = 0.0000, Delta Y = 10.0000, Delta Z = 0.0000

This is a perpendicular line that is 10 units long.

2007-07-24 09:26:51 · answer #9 · answered by Injam 3 · 0 2

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