In $1-8,$ solve for y if possible. Determine whether the equation represents y as a function of x $.$ Write function or not a function.

$x=y^{2}1$

$y=\sqrt[\phantom{2}]{x5}$

$2x3y=4$

$x=-y5$

$x{y}^2=3$

$y=|4-x|$

$x=-7$

$y=8$