Y=mx+b is an equation that you use to make a line on a graph. M equals the slope of the line. B is the Y-intercept or point on the Y-axis where the line starts. X and Y are the domain and range of the line. All of these components are what make any line that is straight.
So, for example, when you are given an equation for a line such as y=2x+3 you could make a line from it. You first look at "b," the y-intercept, which is 3 so you put your first point on the number three on the Y axis. Once you know the starting point of the line you can use the slope to find more points that will be on the line. In this case the slope is 2. That means that, from the y-intercept, you go over two points and up one. So the coordinates of the next point on this line would be (1,5). Once you have done this you can make the line. That is how you make a line using y=mx+b, and how the equation works.
So, for example, when you are given an equation for a line such as y=2x+3 you could make a line from it. You first look at "b," the y-intercept, which is 3 so you put your first point on the number three on the Y axis. Once you know the starting point of the line you can use the slope to find more points that will be on the line. In this case the slope is 2. That means that, from the y-intercept, you go over two points and up one. So the coordinates of the next point on this line would be (1,5). Once you have done this you can make the line. That is how you make a line using y=mx+b, and how the equation works.
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