Posted by keke on Thursday, February 11, 2010 at 2:02pm.
Draw a straight horizonal line that passes through y = -2 on the (vertical) y axis. It should extend over the full width of the graph.
Yes, y=-2 is the equation of the line that contains all the points which have their y-coordinates as -2, such as (3,-2), (5,-2), (-4,-2), etc. Plot those. You'll see that they all lie on a horizontal line which is 2 units below the x-axis. That line is the graph.
Because it not greater or lesser than so the line will only be drawn on figure -2, on y-axis
Because it not greater or lesser than so the line will only be drawn on figure -2, on y-axis on the left side where we have the nagative numbers.