Posted by Sydney on Thursday, September 9, 2010 at 1:35am.
why the line x = 4 is a vertical line.
Name three points on the line represented by x=4. Then explain why, when we connect these points, the line goes straight up and down and does not slant to the left or right.
Is the three point becasue on a graph we have 4 =4 on a graph twice and x + 4 a vertical line because x = 0

Algebra 116 Help Please  drwls, Thursday, September 9, 2010 at 2:09am
Three (x,y) points on the x=4 line could be
(4,0), (4,1) and (4,8) . You could also add (4,any other number)
When you draw a line through these points, it goes straignt up and down, because the x value is always 4.