Which equation represents a nonlinear function?

Answer and the Step-by-step explanation : -

1) x (y - 5) = 2

First you gotta open the brackets so then you'll get : -

xy - 5x = 2

Answer : - " since xy is remaining the equation will not linear "

2) y - 2 (x + 9) = 0

"y - 2x - 18 = 0 "

"Y = 2x + 18 "

Answer : - "This is linear"

3) 3y + 6 (2 - x) = 5

3y + 12 - 6x = 5

3y = 5 - 12 + 6x

3y = 6x - 7

Y = 2x - 7/3

Answer : - This is linear

4) 2 (y + x) = 0

2y + 2x = 0

2y = - 2x

y = - x

Answer : - " This is linear"