State the term of 3x squared minus one

How do you answer this question? (step by step)

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x