For this problem all we need to do is ignore everything except the equation and the input (5.5)
so the steps for this problem are below
we need to plug in 5.5 into our equation as it's our input of time to get our output of height

after simplifying you get
remember to square the 5.5 first (order of operations)

simplify just a tad more and we get this as the final answer

Answer:
Domain: X is an element of real number
It is a function
Step-by-step explanation:
x is an element of all real numbers
y=5x has a one to one relation. It is a function
9.09 I'm pretty sure this it
6..................................... final answer!