Show that the function `f: Rvec` given by `f(x)=x a+b ,` where `a , b in R ,a!=0` is a bijection.

Explanation

`f(x)=x a+b . `


`y = a x+b . \quad \text { (Straight line) } `


`x \in(-\infty, \infty) \quad y \in(-\infty, \infty)`


since range = domain.


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