SOLUTION: how do you graph the direct variation equation of y=9x?

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Question 726841: how do you graph the direct variation equation of y=9x?
Found 2 solutions by jim_thompson5910, MathLover1:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Looking at y=9x we can see that the equation is in slope-intercept form y=mx%2Bb where the slope is m=9 and the y-intercept is b=0 note: y=9x really looks like y=9x%2B0


Since b=0 this tells us that the y-intercept is .Remember the y-intercept is the point where the graph intersects with the y-axis

So we have one point




Now since the slope is comprised of the "rise" over the "run" this means
slope=rise%2Frun

Also, because the slope is 9, this means:

rise%2Frun=9%2F1


which shows us that the rise is 9 and the run is 1. This means that to go from point to point, we can go up 9 and over 1



So starting at , go up 9 units


and to the right 1 unit to get to the next point



Now draw a line through these points to graph y=9x

So this is the graph of y=9x through the points and

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
to graph the direct variation equation of y=9x, just take two values for x, find y for that values and you will get coordinates of two points, than just draw a line through them
take x=0 and x=1
than y=9%2A0=0 and y=9%2A1=9
table:
x|y
0|0
1|9
plot the points (0,0) and (1,9)