G4
From Algebra to Graphs
The easiest way to represent a linear equation as a line on a graph is to start with the x-intercept (0,y) and the y-intercept (x,). You can plot both of these points on an x,y graph. Then all you have to do is connect the line between the two intercepts. You can do the same thing with any two points (x,y), but the intercepts are the easiest to understand and to plot. In that case you don't have to worry about the slope.
Remember that in the special case where y equals a constant, there is no x-intercept and the line is horizontal at the value y. Similarly, in the special case where x equals a constant, there is no y-intercept and the line is vertical at the value x.
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