SOLUTION: Graphing Linear Equations y=2x-4

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Question 357108: Graphing Linear Equations

Answer by jim_thompson5910(33401) About Me  (Show Source):
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Looking at y=2x-4 we can see that the equation is in slope-intercept form y=mx%2Bb where the slope is m=2 and the y-intercept is b=-4

Since b=-4 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

Also, because the slope is 2, this means:


which shows us that the rise is 2 and the run is 1. This means that to go from point to point, we can go up 2 and over 1

So starting at , go up 2 units

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

Now draw a line through these points to graph y=2x-4

So this is the graph of y=2x-4 through the points and

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