Answer :

 4x + 2y = 12
-4x             -4x
___________
2y = 12 - 4x
(2y = 12 - 4x) ÷ 2
y = 6 - 2x
y = -2x + 6

The base equation for this format is y = mx + b when m is the slope and b is the y-intercept.
This means that the slope is -2 (Choice C).

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