Does the graph shown below represent y as a linear function of x?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Iknow the answer but the calculator doesn't seem to give the right one

The manager at gabriela's furniture store is trying to figure out how much to charge for a book shelf that just arrived. the book shelf was bought at a wholesale price of $ 1 4 7 . 0 0 $147.00, and gabriela's furniture store marks up all furniture by 6 0 % 60%. at what price should the manager sell the book shelf?