For my #D graph project. Our main equation was x+4y+2z=4. For me, i have to change the equation so it's (X,Y,-Z) so it'll end up x+4y-2z=4. I find the X,Y.and Z intercepts and they were (4,0,0), (0,1,0), and (0,0,-2). I graph them on the #D coordinate graph and then i connected them and made a 3D plane with the yarns in blue.