Question

Is `x+sqrty=4` a linear function and explain your reasoning?

Answer 1

No it is not.

Explanation:

We have `x + (y)^(1/2) = 4`

`implies (y)^(1/2) = 4-x`

Squaring both sides,

`y = x^2 - 8x + 16`

Looks like a quadratic polynomial doesn't it ?