Question

Which equation is true for the three pairs of x- and y- values in the table

1. -2+2x=y
2. 2-2x=y
3. 2+2x=y
4. -2+x=y​

Answer 1

-2+2=y

Explanation:

Answer 2

1. -2+2x=y

Explanation:

You only need to try the first two lines of the table to determine which equation works.

Only equations 1 and 4 work for the first line of the table (x=0).

• 1. -2 +2·0 = -2 . . . . . . . this works
• 2. 2 -2·0 = 2 ≠ -2
• 3. 2 +2·0 = 2 ≠ -2
• 4. -2 +0 = -2 . . . . . . . this works

Of those, only equation 1 works for the second line of the table (x=1).

• 1. -2 +2·1 = 0 . . . . . . . this works
• 4. -2 +1 = -1 ≠ 0

The equation that is true for the table values is ...

-2 +2x = y