Question

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

Answer 1

ANSWER

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.

Answer 2

Answer:  $f(-1)=1$

Step-by-step 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:

 $f(-1)=-3+4$

 $f(-1)=1$