Answer:
-6x - 2y = 12
Step-by-step explanation:
In graph, y = -6 when x = 0. So y-intercept is -6.
Now look at equations. You must divide the equation by the coefficient of y.
For example, look at the second one.
6x + 2y = 12
Divide by 2 (which is the coefficient of y)
Now equation is 3x + y = 6
Then rearrange it by subtracting 3x.
y = -3x + 6
Obviously this isn't the answer b/c the y-intercept here is 6, not -6.
Do the same for all.
The last one:
-6x - 2y = 12
-3x - y = 6
-y = 3x + 6
y = -3x - 6
This is the answer because the y-intercept is -6.
