The domain is the set of all values that x could be. Look at the graph, from what integer to what integer is there an x value?
The range is the set of all values that y could be. Look at the graph, from what integer to what integer does a y-value exist?
The DOMAIN is all of the x values the graph encompasses.....it goes from -3 to 3 inclusive
[-3,3]
The RANGE is all of the 'y' values the graph covers from 1 to 4 inclusive [1,4]