Question

An equation that defined y as a function f of x is given

Answer 1

The equation is given in the question.

`x+2y=8`

To determine the y in terms of x ,

`y=(8-x)/(2)=4-(x)/(2)`

Replace y with f(x),

`f(x)=4-(x)/(2)`

The value of f(5) is

`f(5)=4-(5)/(2)=(3)/(2)`

The value of f(5) is 3/2.