My sister is 19 years old. my brother says that his age minus eighteen is equal to my sister's age. how old is my brother? enter an equation, using b as your variable, to find how old my brother is. the equation is my brother is years old.

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done