SOLUTION: given e(-4,k) and f(k,8). find k if the slope of ef is 3/4.

Algebra ->  Points-lines-and-rays -> SOLUTION: given e(-4,k) and f(k,8). find k if the slope of ef is 3/4.       Log On


   

Question 823338: given e(-4,k) and f(k,8). find k if the slope of ef is 3/4.


Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
m = (y2 - y1)/(x2 - x1)

3/4 = (8-k)/(k-(-4))

3/4 = (8-k)/(k+4)

3(k+4) = 4(8-k)

3k+12 = 32-4k

3k = 32-4k-12

3k+4k = 32-12

7k = 32-12

7k = 20

k = 20/7