[CLA notes : Try this without using your calculators. ]

[CLA notes : Pay close attentions to the domains for each equations. ]

[CLA notes : A straight forward min-max problem where you have to be careful of the absolute value in the function. ]

[CLA notes : The key information to process is what it means for a function to have negative value for certain x value and positive value for different x value. In other word, remember the Intermediate Value Property of a function. ]

[CLA note : Just keep narrowing down the possibilities. Every clue here is important, and the whole thing is easier than it appears. ]

[CLA notes : Pay close attentions to the hatch marks on the graph.]

[CLA notes 2 : It is possible to guess the answers but the usual practice of the day was for the students to submit the work needed to arrive at the answer as well as the answers. Try to formally write out all the steps needed to arrive definitively at the answer.]