Find the undo rules for each of the functions below. use function notation and give the undo rule a name different from the original function's. justify that each undo rule works for its function.

a. f(x)=3(x-2)
b. h(x)=x^3-5

Eiko is wearing a magic ring that increases the power of her healing spell by 30%. without the ring, her healing spell restores h health points. which of the following expressions could represent how many health points the spell restores when eiko is wearing the magic ring?