The equation of a line is nothing more than a way to describe a set of ordered pairs. In this case, you want the set of ordered pairs where the -coordinate in every one of them is and all of the -coordinates comprise the entire set of real numbers. To construct the graph, pick any point you like that has a -coordinate of . Plot the point. Then pick a different point with a -coordinate of 4 (you have an infinite number to choose from and it doesn't really matter which ones you choose). Plot the second point. Draw a line across your grid through the two points.
John
My calculator said it, I believe it, that settles it
