It is a line. There are many ways to graph it using intercepts etc. But, you can pick some x points, plug them in your equation, and find the corresponding y point,
The graph those (x,y) values
This would be an upside-down parabola, with it's apex being at {0,0}. You can graph it by taking a few values of x (-2, -1, 0, 1, and 2 would be enough), finding their corresponding y positions(-4,...
x - y = -2 Get the y alone on the left. - y = -2 - x y = 2 + x y = x + 2 This is the slope-intercept form. y=mx+b m=slope=1 and b=intercept=2 This means that the graph has a slope of 1, so goes up...
The coodinates for x+y = 2 are (2,0) and (0, 2)The coordinates for x-y = 4 are (4, 0) and (0, -4)Plot the coordinates on graph paper and join them up with straight lines they should intersect at (3,...