Answer
(1) $y=x^4$
(2) $y=x^2$
(3) $y=x^6$
(4) $y=x^3$
(5) $y=x^5$
See graph below.
Work Step by Step
Functions 1,2, and 3 are even degree polynomials, while functions 4 and 5 are odd degree polynomials.
Judging from the flatness of the bottoms of these curves, we can identify the degrees of order from low
to high as $2,1,3$, so the first three functions can be identified as the following:
(1) $y=x^4$
(2) $y=x^2$
(3) $y=x^6$
Judging from the flatness of the curves 4 and 5, we can identify that function 5 is of higher order of degrees, so that:
(4) $y=x^3$
(5) $y=x^5$