In each of the following cases, state whether the function is one-one, onto or bijective. Justify your answer.

(i) *f* : **R → R** defined by *f(x)* = 3 – 4x

(ii) *f* : **R → R** defined by *f(x)* = 1 + x2

(i) *f* : **R → R** defined by *f(x)* = 3 – 4x

(ii) *f* : **R → R** defined by *f(x)* = 1 + x2