Inverse functions Inverse Functions If f is a one-to-one function with domain A and range B, we can de ne an inverse function f 1 (with domain B ) by the rule f 1(y) = x if and only if f(x) = y: This is a sound de nition of a function, precisely because each value of y in the domain of f 1 has exactly one x in A associated to it by the rule y = f(x).
<span>By installing efficient water fixtures the average American can reduce water use to about 45 gallons of water per day.Using such water fixtures about how many gallons of water would the average American use in December </span> D about 2000 gallons
