The value of a graphed function doubles for each increase of 1 in the value of x. Which of the following could be the parent function of the graphed function? y = 2 Superscript x y = x squared y = StartAbsoluteValue x EndAbsoluteValue y = StartRoot x EndRoot

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?