It's B cause it's open upwards.
Start off by making a ratio and write down the given. From there solve and multiply. Hopefully the picture helps :)
My calculator said -98 :)
I hope I helped:)
Answer:
(-31,15)
Step-by-step explanation:
Rotating 90 degrees clockwise is very simple:
(a,b) 90 degrees= (-b,a)
Very simple.
Just switch sides and add negative to the first term.