Question

If `f(x)=2x-5`, then what is f(0)?

Answer 1

`f(0) = -5`

Explanation:

To solve this problem substitute `color(red)(0)` for each occurrence of `color(red)(x)` in the function and the calculate the result.

`f(color(red)(x)) = 2color(red)(x) - 5` becomes:

`f(color(red)(0)) = (2 xx color(red)(0)) - 5`

`f(color(red)(0)) = 0 - 5`

`f(color(red)(0)) = -5`