Answer:
multiply by -3
Step-by-step explanation:
1/3 gives -3/3=-1
-1*-3=3
3*-3=-9
it defines the function f so that f(x)=-3x
I hope I helped you^_^
the answer is going to be 6.0
1.5 + 1.5 = 3
3 + 3 = 6