Consider y=-4
complete the table for the equation

x y
0 ?
1 ?
2 ?

0=0
1=-4
2=-8
3=-12
Negative numbers are just normal numbers with the - if you’re subtracting but if you’re trying to add then it would be

0=0
1=-4
2=0

unless you think 0 equals the -4 and in that case then just move the numbers i put up one and the 2 in that case would be 4.