I need help. the problem says .
Find an equation, in slope-intercept form, that passes through point (1,-5) with slope -1
can you help fast?
2007-04-11 08:51:43 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Slope-intercept form is y = mx + b. Here m is the slope, so this means the equation is y = -x + b for some value "b". Plug in (1, -5) and you can solve for b:
-5 = -1 + b, so -4 = b
Thus the equation is y = -x - 4.
2007-04-11 08:58:36 · answer #1 · answered by Anonymous · 0⤊ 0⤋
First, start with point-slope form:
y + 5 = -1(x - 1)
Then convert to slope-intercept:
y = -x + 1 - 5
y = -x - 4
The slope is -1, and the intercept is -4.
Plug in (1, -5) to check:
-5 = -1 - 4
-5 = -5
2007-04-11 08:55:45 · answer #2 · answered by computerguy103 6 · 0⤊ 0⤋
y+5=-(x-1)
y=-x-4
2007-04-11 09:00:27 · answer #3 · answered by katsaounisvagelis 5 · 0⤊ 0⤋
slope intercept form
y = mx + b
- 5 = - 1(1) + b
- 5 = - 1 + b
- 5 + 1 = - 1 + b + 1
- 4 = b
- - - - - - -
The equation
y = - 1x - 4
- - - - - - - - - -s-
2007-04-11 10:21:12 · answer #4 · answered by SAMUEL D 7 · 0⤊ 0⤋
using point-slope form:
y - (-5) = -1( x - 1)
y + 5 = -x + 1
y = -x - 4
2007-04-11 08:58:14 · answer #5 · answered by Philo 7 · 0⤊ 0⤋
y-ysub1=m(x-xsub1) plug in the numbers
y--5=-1(x-1)
y+5=-x+1 subtract 5 from both sides
y= -x-4
2007-04-11 09:00:05 · answer #6 · answered by Justina 3 · 0⤊ 0⤋
slopes the rise over the run
delta x/delta y
2007-04-11 08:57:37 · answer #7 · answered by *Kara* 2 · 0⤊ 0⤋
m = -1
x = 1
y = -5
y=mx+b
-5=-1*1+b
-5=-1+b
-4=b
y=-1x-4
y = -x - 4
2007-04-11 08:54:53 · answer #8 · answered by bourqueno77 4 · 0⤊ 0⤋
slope m=( y-y1)/(x-x1)
-1 = (y --5)/(x-1)
1-x = y +5
y =-x -4 or y= -(x+4)
2007-04-11 09:03:29 · answer #9 · answered by bignose68 4 · 0⤊ 0⤋
sub.-in everything in y=mx=b and slove for b=?
b= -4
so... y= -x-4
2007-04-11 09:04:34 · answer #10 · answered by Luna_5 2 · 0⤊ 0⤋