Answer:
v = ± 
Step-by-step explanation:
Given
E =
( multiply both sides by 2 to clear the fraction )
2E = mv² ( divide both sides by m )
= v² ( take the square root of both sides )
v = ± 
Not sure if this is the right answer but try math-way it helps me a lot.
Answer:
-1
Step-by-step explanation:
The constant rate of change is -y for every one x.
The right answer may be option 4