2x - 4y = 10
Turn this into slope-intercept form :)
Slope-intercept form : y = mx + b
Where m = slope, and b = slope intercept.
So, we're basically taking the x and moving it to the other side :)
2x - 4y = 10
Subtract 2x from both sides.
-4y = -2x + 10
Divide both sides by -4.
y = 1/2x -5/4
So, our slope is 1/2 because it is in the "m" value.
Our answer is D) 1/2
~Hope I helped!~