SOLUTION: y=-x-2x. how do i slove this problem? how do i graph it?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: y=-x-2x. how do i slove this problem? how do i graph it?      Log On


   

Question 81461This question is from textbook
: y=-x-2x. how do i slove this problem? how do i graph it? This question is from textbook

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
Y=-X-2X YOU COMBINE THE X TERMS THUS:
Y=-3X NOW YOU SET X=0 & SOLVE FOR Y THUS
Y=-3*0
Y=0 THIS GIVES YOU ONE POINT (0,0)
NOW SET X=ANY OTGHER VALUE LIKE 5 AND SOLVE FOR Y THUS
Y=-3*5
Y=-15 THIS GIVES YOU A SECOND SET OF POINTS (5,-15).
NOW PLOT THESE 2 SETS OF POINTS & DRAW A LINE BETWEEN THEM THUS:
+graph%28+300%2C+200%2C+-6%2C+6%2C+-20%2C+10%2C+y+=+-3x%29+ (graph 300x200 pixels, x from -6 to 6, y from -20 to 10, y = -3x).