Answer:
perpendicular
Step-by-step explanation:
The standard form of equation of a line is expressed as y = mx+c
m is the slope
c is the intercept
For the line Y= -1/2x-11
Compare
mx = -1/2x
m = -1/2
slope = -1/2
For the equation
16x-8y=-8
Divide through by 8
2x - y = -1
- y = -2x-2
y = 2x+2
Compare
mx = 2x
M = 2
Take the product of the slopes
Mm = -1/2 * 2
Mm = -1
Since the product of their slope is -1, hence the two lines are perpendicular
