Answer:
11- All 0's are on the x and y planes
12- All positive points/numbers are where the x and y axis are both positive (Quadrant 1, 2, and 4)
13- All negative points/numbers would be wherever the x and y axis are negative (Quadrants 2, 3, and 4)
-3x - 18 = 0
-3x = 18
x = -6
Answer:
2x + 4y = 12 and y = -1/2x + 3