Answer:
f(x) is equal to -1 when x=3
Step-by-step explanation:
we have
[tex]y=f(x)=-1[/tex]
This is a constant function
we know that
A constant function is a function whose output value is the same for every input value
therefore
when x=3 (input value)
The value of the function is y=-1 (output value)
