Answer:
slope of 1/2
Explanation:
x-2y=-18
First, get the equation in slope intercept form
y = mx+b where m is the slope and b is the y-intercept
-2y = -x -18
Divide each side by -2
y = 1/2 x + 9
The slope is 1/2
Parallel lines have the same slope, so lines that are parallel will have a slope of 1/2