We have a piecewise function that we should evaluate based on the condition of the independent variable
It is the value of the independent variable that will dictate which of the two equations to use
We can see that the value of the independent variable given is -3
Mathematically, -3 is not greater than 3; so this means the value of the independent variable given falls within the domain of the second part of the piece-wise function
Hence, we are to evaluate f(x) = -(x + 1) at the point x = -3
Thus;
f(-3) = -(-3 + 1)
f(-3) = -(-2)
f(-3) = 2