algebra
posted by Anonymous .
Find the value of y so that the line passing through the two points has the given slope?
1. (12,y), (6,9/7), m= 1/6
_____________
write an equation in slopeintercept form. (then graph the equation).
2. 18y+2x9=0
3. 3x4y=8

y=mx+c
m= 1/6
y=(1/6)x+c
The point (6,9/7) must be on that line: use it to find c by plugging in x and y like
9/7=(1/6)(6)+c
So what's c?
So now we have the equation of the line, we need the value of the point on that line where x=12. Plug in 12 instead of x in the equation and work out what y must be.
18y+2x9=0
we need to write as y=mx+c
18y+2x9=0
move everything but y to the RHS:
18y=2x+9
y=(2/18)x+9/18
which you can simplify a bit.
You can do the other yourself the same way.