Answer:
I hope it helps .in case you don't understand any part ,feel free to ask.
68 because I found out on internet
Basically y would be whatever the number x is times 2, so -2 to the second power is -4, -1 to the second power is -1, 0 to the second power is 0, 1 to the second power is 1 and 2 to the second power is 4. now all you have to do is graph those points and you’re good!
so the coat went down from 50 to 35, namely 15.
if we take 50 to be the 100%, what is 15 off of it in percentage?

Force = mass x exceleration
1100 x 0.5 = 550