Answer:
B
Step-by-step explanation:
So from the first graphs equation is
2x-y=-1
therefore if we made y the subject of the formula, the equation would be
2x+1=y , this is also the same as y=2x+1
from this, the equation is clearly in the form y=mx+c so we can get the gradient
The gradient of graph one would be 2
The perpendicular gradient would be the negative reciprocal of graph one's gradient which would be -1/2
Now we look at our options and see which one has the gradient as -1/2