Question

F(x)=3x+4. Determine the value of F (X) when X equals -1

Answer 1

Answer:
`f(-1)=1`

Explanation:

Given the linear function f(x):

`f(x)=3x+4`

By definition. a relation is a function if each input value has only one output value. In this case you need to find the output value for the input value
`x=-1`. In order to do this, you need to substitute this value of the variable "x" into the linear function given.

Then:

When
`x=-1`:

`f(-1)=3(-1)+4`

Remember the multiplication of signs:

`(+)(-)=-\\(+)(+)=+\\(-)(-)=+`

Then, the value of f(x) when
`x=-1` is:

`f(-1)=-3+4`

`f(-1)=1`

Answer 2

The value of this function at x=-1 is 1

EXPLANATION

The given function is

`f(x) = 3x + 4`

We want to find the value of this function at x=-1.

We substitute x=-1 into the function to obtain:

`f( - 1) = 3( - 1)+ 4`

We multiply out to obtain:

`f( - 1) = - 3+ 4`

`f( - 1) = 1`

Therefore the value of this function at x=-1 is 1.