which is an equation of the given line in
standard form?
(1/2,3) and (-4,-1)
a.)-8x+9y=23
b.)-8x+9y=-23
c.)-8x+7y=25
d.)-9x+8y=-23

Question

which is an equation of the given line in
standard form?
(1/2,3) and (-4,-1)
a.)-8x+9y=23
b.)-8x+9y=-23
c.)-8x+7y=25
d.)-9x+8y=-23

blurbendy · Answer

The first step is to find the slope:
slope = y2 - y1 / x2 - x1
where y2 = -1
y1 = 1
x2 = -4
x1 = 1/2

Can you find the slope?

anonymous · Answer

kinda im that not the best at it

blurbendy · Answer

It's okay, show me what you got.

anonymous · Answer

ok so I know that you have to y1 -y2 and x1 -x2 so for y is 1/2 - -4= 5 and the 
x1 - x2 is 3-(-1) = 4 and that is what I got so far

blurbendy · Answer

-1 -3 = -4
-4-1/2 = -4.5
-4/-4.5 = 8/9

now put this in the form:
y - y1 = 8/9(x - x1)
y +1 = 8/9x + 32/9
y = 8/9x + 23/9

standard form = Ax + By = C
multiply everything by 9
9y = 8x + 23
-8x +9y = 23