Respuesta :
Put it into point-slope form:
y-y1= m(x-x1)
(x1,y1) <== the points m<== the slope Keep the other x and y the same.
y-7= -1/5(x-(-3)
y-7=-1/5(x+3)
We can multiply everything by -5, to get a constant number.
y-35=1(-5x-15)
-5y-35= -5x-15
Add 35 to both sides.
-5y=-5x+20
We can put this in standard form as well.
Ax+By= C
Subtract 20 on both sides.
-5y-20= -5x
Add 5y to the other sides.
-20=-5x+5y or -5x+5y=-20 <== standard form
I hope this helps!
~kaikers
y-y1= m(x-x1)
(x1,y1) <== the points m<== the slope Keep the other x and y the same.
y-7= -1/5(x-(-3)
y-7=-1/5(x+3)
We can multiply everything by -5, to get a constant number.
y-35=1(-5x-15)
-5y-35= -5x-15
Add 35 to both sides.
-5y=-5x+20
We can put this in standard form as well.
Ax+By= C
Subtract 20 on both sides.
-5y-20= -5x
Add 5y to the other sides.
-20=-5x+5y or -5x+5y=-20 <== standard form
I hope this helps!
~kaikers
You are trying to find a line that has a general equation of
y = mx + b
You know what m is because it is given as the slope.
m = - 1/5
y = - 1/5 x + b
Now to use the point to find b
y = 7
x = - 3
7 = -1/5 (-3) + b
7 = 3/5 + b look out for those nasty minus signs. There are 2 of them and they turn into plus.
7 - 3/5 = b
b = 6 2/5 = 6.4
Change m to -0.2
So y = -0.2 x + 6.4
y = mx + b
You know what m is because it is given as the slope.
m = - 1/5
y = - 1/5 x + b
Now to use the point to find b
y = 7
x = - 3
7 = -1/5 (-3) + b
7 = 3/5 + b look out for those nasty minus signs. There are 2 of them and they turn into plus.
7 - 3/5 = b
b = 6 2/5 = 6.4
Change m to -0.2
So y = -0.2 x + 6.4