2007-05-23 02:54:09 · 5 answers · asked by lalupfer2002 1 in Science & Mathematics ➔ Mathematics
y=-3x+9
the standard form is y=mx+c
where m, the coefficient of x, is the gradient and c is the y intersect.
we know the gradient is -3 so we know y=-3x+c
if we put in the co-ordinates we get
-3=-12+c
rearranging gives 9=c
so we put in c to get
y=-3x+9
2007-05-23 02:57:15 · answer #1 · answered by Anonymous · 1⤊ 0⤋
-3x +b =y so -3(4) +b = -3 b=9
- 3x+ 9 = y is your equation
2007-05-23 10:00:06 · answer #2 · answered by dwinbaycity 5 · 0⤊ 0⤋
y + 3 = - 3.(x - 4)
y + 3 = - 3x + 12
y = - 3x + 9
2007-05-23 14:27:42 · answer #3 · answered by Como 7 · 0⤊ 0⤋
the desired equation is
y+3=-3(x-4).
y+3=-3x+12
3x+y-9=0answer
2007-05-23 09:59:25 · answer #4 · answered by Anonymous · 0⤊ 2⤋
y=-3x+9
2007-05-23 09:58:00 · answer #5 · answered by Ben 2 · 2⤊ 0⤋