Question

is y=2x^3+5/4 a function

Answer 1

actually, no, it is an equation, but they want you to say "yes"

Answer 2

\[f(x)=2x^3+\frac{5}{4}\] is a function because it is written as one

Answer 3

\[\{(x,y)|y=2x^3+\frac{4}{5}\}\] is also written as a function

Answer 4

but like i said, they want you to say "yes' because each x produces only one y