# If f(x)=-6x-3, find f(0)?

f(0)=color(blue)(-3
If $f \left(x\right) = - 6 x - 3$, find $f \left(0\right)$ means $x = 0$.
Substitute $0$ for $x$ and solve.
f(0)=-6(0)-3=color(blue)(-3