For y - 2y - 3y equals 0, y equals 0.
-y + y equals 0.
y - 3 = 0 y = 3
solve for y so if x + y = 0 then y = -x
many solutions
For y - 2y - 3y equals 0, y equals 0.
-y + y equals 0.
y= -2x
y - 3 = 0 y = 3
solve for y so if x + y = 0 then y = -x
many solutions
Set x=0, solve for y, which is the y intercept: 0 - 3y = 9 --> y = -3. Set y=0 and solve for x = 9 for x-intercept.
y=±√15
y = 3, 6
x = -1.2, y = -3
0
x = 12