Respuesta :
The value of x can be any real number greater than or equal to 0, but the value of y must be an integer greater than or equal to 0.
2x= y
eg. 2(0)= 0
0=0
2(2)=4
4=4
2x= y
eg. 2(0)= 0
0=0
2(2)=4
4=4