SOLUTION: I'm very confused about how to solve to find the missing coordinate when the slope is given. I'm getting mixed up in the steps to solve this and could use a run down of the step

Algebra ->  Coordinate-system -> SOLUTION: I'm very confused about how to solve to find the missing coordinate when the slope is given. I'm getting mixed up in the steps to solve this and could use a run down of the step      Log On


   

Question 258143: I'm very confused about how to solve to find the missing coordinate when the slope is given.
I'm getting mixed up in the steps to solve this and could use a run down of the steps involved.
m=3/4, (-2,0) (5,?)
Thank You so much in advance!
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
The slope formula is
(i) m+=+%28y2-y1%29%2F%28x2-x1%29
we are given
m = 3/4
(x1,y1) = (-2,0)
(x2,y2) = (5,?)
we can put everything in except y2. From (i) we get
(ii) %283%2F4%29+=+%28y2-0%29%2F%285-%28-2%29%29
be careful about your signs.
simplifying (ii) we get
(iii) %283%2F4%29+=+%28Y2%2F7%29
cross multiply to get
(iv) 21+=+4Y2
finally dividing, we get
Y2+=+21%2F4
This is the missing part.