Answer:
2x + y = - 5
Step-by-step explanation:
We can write the equations in the form
y = mx +b to see what line has slope - 2.
1) 2x+y = -5, y = -2x - 5, slope = -2
2)2x -y = -5, y = 2x +5 , slope = 2
3) x -2y =5, 2y =x-5, y = (1/2)x -5/2, slope is 1/2
4) x -2y = -5, 2y = x + 5, y = (1/2)x + 5, slope is 1/2
So, we have only one equation with slope -2.
We can check the point M.
2x + y = -5
2*(-1) +(-3)= - 5
-5 = -5 True
