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Question 114086This question is from textbook Beginning Algebra
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Graph y = 3x.
I am not understanding how to solve this type of problem and then graph it. Can you help break it down for me. I have to do a number of similar type problems. Thanks!
This question is from textbook Beginning Algebra
Found 2 solutions by stanbon, checkley71:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Graph y = 3x.
Plot two points and draw a line thru them.
Let x=0, then y=0 giving you point (0,0)
Let x=2, then y = 6 giving you point (2,6)
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Cheers,
Stan H.
Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website! NORMALLY TO SOLVE LINE EQUATIONS YOU SET Y=0 & SOLVE FOR X & THEN SET X=0 & SOLVE FOR Y.
IN THIS CASE [y=3x] YOU HAVE (0,0) FOR THIS SOLUTION.
HOWEVER YOU HAVE A SLOPE(m)=3 WHICH SAYS FOR EVERY 3 CHANGES IN Y VALUE YOU HAVE A COM[PANION CHANGE IN THE X VALUE OF 1.
EXAMPLE IF Y=3 THEN X=1 OR(1,3). IF Y=6 THEN X=2 OR (2,6).
THE FOLLOWING GRAPH WILL SHOW YOU WAHT THIS LINE LOOKS LIKE WHEN PROPERLY GRAPHED.
 (graph 300x300 pixels, x from -6 to 6, y from -6 to 6, y = 3x).
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