The answer is m^2/n so basically the second option.
D. No x value has more than one y value so it's a function.
I’m not exactly sure how to calculate the grade, but this is what I’ve done below. Hope it helps!
Answer: 49
Step-by-step explanation:
A. 
To find greater than or smaller than relation, we multiply the terms like (numerator of L.H.S with denominator of R.H.S and put the value on the left side. Then multiply the denominator of L.H.S with numerator of R.H.S and put the value on right side. Now compare the digits.)
So, solving A, we get 810<209 ... This is false
B. 
= 238>589 ..... This is false
C. 
= 496>780 .... This is false
D. 
= 420<660 ..... This is true
Hence, option D is true.