SOLUTION: IF A LINE HAS A SLOPE OF 3 AND PASSES THROUGH THE POINTS (-2,-7) AND (4,K) WHAT IS THE VALUE OF K? Thank you! An explanation would be lovely too. :)

Algebra ->  Linear-equations -> SOLUTION: IF A LINE HAS A SLOPE OF 3 AND PASSES THROUGH THE POINTS (-2,-7) AND (4,K) WHAT IS THE VALUE OF K? Thank you! An explanation would be lovely too. :)      Log On


   

Question 630335: IF A LINE HAS A SLOPE OF 3 AND PASSES THROUGH THE POINTS (-2,-7) AND (4,K) WHAT IS THE VALUE OF K? Thank you! An explanation would be lovely too. :)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 Slope m = 3

 (4, K)

 (-2,-7)  m = (K+7)/6   m+=%28y%5B2%5D+-+y%5B1%5D%29%2F%28x%5B2%5D+-+x%5B1%5D%29

(K+7)/6 = 3

  K +7 = 18

    K = 11 

and...

 (4, 11)

 (-2,-7)  m = 18/6 = 3