3D graphing true or false question??????????? 10 POINTS?

TRUE or FALSE





(1,0,-1) is on the plane 2x-4y=6





and





(1,20,-1) is on the plane 2x-4y=6





please explain how to slove this, too


3D graphing true or false question??????????? 10 POINTS?
1)


false





2(1) - 4(0) = 6


2 = 6


not true so it is not on the plane





2)


false


2(1) - 4(20) = 6


-78 = 6


not true so it is not on the plane