2007-01-27 06:04:45 · 8 answers · asked by Julie 1 in Science & Mathematics ➔ Mathematics
First: you need to know the slope formul which is...
m = [second y - first y] / [second x - first x]
Sec: place the points in the formula...
m = [9 - (-5)] / [-1 - 1]
m = [9+5] / [-2]
m = 14/-2
m = -7
2007-01-27 06:11:48 · answer #1 · answered by ♪♥Annie♥♪ 6 · 0⤊ 0⤋
Slope is defined as the "change in the y values" divided by the "change in the x values." So,
9 - (-5)
------ = slope
-1 - 1
14
--- = -7
-2
HTH
Charles
2007-01-27 14:22:40 · answer #2 · answered by Charles 6 · 0⤊ 0⤋
The gradient of the line is the change in y (from -5 to 9 = 14) divided by the change in x (from 1 to -1 = -2)
m (gradient) = 14/-2
m = -7
The most important thing here is to make sure that you are consistent with which co-ordinate you take from which.
Hope this helps!
2007-01-27 14:11:05 · answer #3 · answered by readie252 2 · 0⤊ 0⤋
I always thought slope was "change in y over change in x."
Slope = (9 - -5)/(-1 - 1)
Slope = (14)/(-2)
Slope = -7
2007-01-27 14:10:16 · answer #4 · answered by rich h 3 · 0⤊ 0⤋
Slope = 14 / -2 = -7
Slope is -7
2007-01-27 14:09:58 · answer #5 · answered by Anonymous · 0⤊ 0⤋
you write in y=ax+b replace x and y with coordinates of the point
-5 =a+b(1)
-9 = -a +b (2) you add (1) and (2) -14 =2b
this gives b=-7 and a=2
So y = 2x-7
2007-01-27 14:15:41 · answer #6 · answered by maussy 7 · 0⤊ 0⤋
to find the slope you need a formula which is y2-y1/x2-x1
9--5/-1-1
9+5/-1-1
14/-2
slope=-7
2007-01-27 14:11:46 · answer #7 · answered by memo 2 · 0⤊ 0⤋
m=(-5-9)/(1-(-1))=-14/2=-7
2007-01-27 15:23:43 · answer #8 · answered by yupchagee 7 · 0⤊ 0⤋