Question

Use the graph below to fill in the blank with the correct number: f(1) = _______

Answer 1

we know that

$f(1)$ is the value of the function when the value of x is equal to $1$

In this problem,  look on the graph to see

For $x=1$

the value of the function is  $f(1)=-2$

therefore

the answer is

$f(1)=-2$

Answer 2

F(1)= -2

Remember that when dealing with functions, it is written in the form of f(x). In this case, the x= 1, so its asking for the y value when x=1.