Question

How do you evaluate the function `f(x) = 3x – 2`, when x = –1?

Answer 1

Replacing `x` with `(-1)` and performing standard arithmetic gives
`color(white)("XXXX")` `f(-1) = -5`

Explanation:

If `f(x) = 3x-2`

when the variable `x` is replace with an actual value `(-1)`
we get
`color(white)("XXXX")` `f(-1) = 3(-1) -2`
`color(white)("XXXX")` `color(white)("XXXX")` `=-3-2`
`color(white)("XXXX")` `color(white)("XXXX")` `=-5`