A function, named g, has an input of c, and a range of all real numbers.

Question

Which of the following best represents the described function?

c(g)=45g+25
c(g)=4g2−2g+1
g(c)=45c+25
g(c)=4c2−2c+1

Answer 1

you know that parabolas have a vertex (max or min) so their range cannot be all real numbers.

Only polynomials of odd degree will work here.
So, yes (C), since g is a function of c