Question

Find the f(-1) of f(x)=5x+12

Answer 1

f(- 1) = 7

Explanation:

To evaluate f(- 1) substitute x = - 1 into f(x)

f(- 1) = 5(- 1) + 12 = - 5 + 12 = 7

Answer 2

For this case we have a function of the form
`y = f (x)`, where:

`f (x) = 5x + 12`

We must find the value of the function when x = -1.

That is,
`f (-1)`:

`f (-1) = 5 (-1) +12\\f (-1) = - 5 + 12`

Different signs are subtracted and the sign of the major is placed:

`f (-1) = 7`

Answer:

`f (-1) = 7`