Question 98629
not necessary to have all x values negative. all values of x=-y values & all values of y=-x values.
table
x---y
1--(-1)
2--(-2)
-1-(1)
-2-(2
5--(-5)
graph y=-x 
{{{ graph( 300, 200, -6, 5, -10, 10, y = -x) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -x).