Answer:
The slope is -1/2
Explanation:
x + 2y=4
Lets get the equation in the form y= mx+b
where m is the slope and b is the y intercept.
x + 2y=4
Subtract x from each side
x-x+2y = -x+4
2y = -x+4
Divide each side by 2
2y/2 = -1/2 x +4/2
y = -1/2x +2
The slope is -1/2