Find the domain of the graphed function

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?

Cheryl works as a hotel maid. the number of hotel rooms she cleans is directly proportional to the number of hours she works. the graph shows that r rooms are cleaned in t hours. using the graph below answer the following questions under it