As my memory serves me well, innovations like the production of gunpowder, tea, and silk are usually attributed to D. China
I think it is the 3rd answer choice.
Answer:

Explanation:
y=2x-5
y=mx+b
perpendicular = slope is -1
y=-1/2x+b
Passes throught 2,-5
-5=-1/2(2)+b
-5=-1+b
b=-4
y=-1/2x-4
Hope this helps!