Answer:
f(4) = (4-1) = 3
f(2) = (2-1) = 1
f(-27) = (-27 -1) = -28
There isn't any error while describing the functions and everything looks fine.
If you still have problem then send the question again with the image of your book.
Step-by-step explanation:
I hope this helps ☺️❤️
