Question

complete the equation describing how x and y are related.

x	y
0	2
1	0
2	-2
3	-4
4	-6

$y = -2x + ?$
enter the number that belongs in the green box.

Explanation:

Step1: Pick x=0, y=2

Substitute into $y=-2x+[?]$

Step2: Solve for the constant

$2 = -2(0) + c$
$2 = 0 + c$
$c=2$

Step3: Verify with another point

Use x=1, y=0: $0=-2(1)+2$
$0=-2+2$, which holds true.

Answer:

2