Y=mx+b is a formula that you use to graph a linear function or just line.  The "m" represents the slope of the line, so if m=2 then you would start at the starting point and go up two, and over one.  The only problem is that you don't know where to start the line. You only know the slope.  That is what "b" is for.  "B" represents the starting point of the line, or the y-intercept, which is the point along the y-axis where the line crosses it.  If you know the value of "m" and "b" you can graph the line.


Step 1: Example equation y=2x+1
Step 2: Y-intercept is 1 so graph a point on (0,1)
Step 3: From (0,1) go up two, over one to find the next point (3,1)
Step 4: Keep adding points, then connect them to create the line


As you can see it is really very simple to create at graphed line when using y=mx+b!



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