SOLUTION: The points (-3,2) and (1,r) lie on a line with slope 3. Find the missing coordinate r.

Algebra ->  Graphs -> SOLUTION: The points (-3,2) and (1,r) lie on a line with slope 3. Find the missing coordinate r.      Log On


   

Question 1100809: The points (-3,2) and (1,r) lie on a line with slope 3. Find the missing coordinate r.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
change in y/change in x=3
(r-2)/(1+3)=3
r-2=r(3)=12
r=14
(14-2)/(1-(-3))=3