On the Cartesian plane the x line is the horizontal axis and the y line is the vertical axis.
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x - y - 2 = 0-y = -x + 2y = x - 2The graph is a straight line. The slope of the line is [2].The line intersects the x-axis at [x=2], and the y-axis at [y=-2].
The graph of y > - x is an area, firstly draw the line y = -x which is a line sloping diagonally upwards to the left at 45o and the area where y > -x is the area above the line
If you mean -x+y = 12 then y = x+12 and so the parallel line will have the same slope but with a different y intercept.
For the line y = 3 , there is no x-intersect., because y = 3 is a parallel line with y- 0 ( the x-axis).
The x-intercept is defined by where a line crosses the x-axis. The y-intercept is defined by where a line crosses the y-axis.