It’s the answer is gotta be it has to be c
X=6 and 2/3
the proportion is also 3:5
we basically use inverse functions in our daily lives all the time
to give you a more complicated example : knowing the interest rate, you have a function to calculate the cumulative value of an installment payment
functions are also used in computing
Hopefully this is correct but i’m no 100% sure if i’m right... check with a classmate