Question

What table of values goes with the equation y = |-2x|?


x y
-2 4
-1 2
0 0
1 2
2 4

x y
-2 4
-1 2
0 0
1 -2
2 -4

x y
-2 -4
-1 -2
0 0
1 2
2 4

x y
-2 -4
-1 -2
0 0
1 -2
2 -4

Answer 1

The correct table is the first one:

x y
-2 4
-1 2
0 0
1 2
2 4

Because y = |-2x| = 2|x|, so y = 2·|x| gives those values.