Which function is nonlinear?

Answer:
option C
Step-by-step explanation:
if a function is linear then we know that the highest exponent is 1
so we just look for a function that doesn't have an exponent of 1 and that's option C which has an exponent of 4
Answer:
C and E
Step-by-step explanation:
[tex]c) \: \: y = 2 + 6 {x}^{4} \\ \\ e) \: \: \frac{x}{y} + 1 = 2 \\ \\ are \: non \: linear[/tex]