1) y =2 x <=> x^2 = 2x => x =0(l) ; x =2 => M1(2;4)
2) y =3 x <=> x^2 = 3x => x =0(l) ; x =2 => M2(3;9)
3) y = x <=> x^2 = x => x =0 ; x =1 =>M31(0;0); M32(1;1)
4) y =- x <=> x^2 = -x => ; x =-1 => M1(-1;1)
5) 2y =3 x <=> 2x^2 = 3x => ; x =3/2 => M5(3/2;9/4)