Question

i will mark as brainliest​

Answer 1

${ \huge{ \boxed{x + \frac{ \sqrt{y} }{9} = 1 }}}\\ \\ { \huge{ \boxed{ \frac{ \sqrt{y} }{9} = 1 - x}}} \\ \\ { \huge{ \boxed{ \sqrt{y} = 9 - 9x}}} \\ \\ { \huge{ \boxed{y = {(9 - 9x)}^{2} }}}$