Please help thanks so much

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

The graph shown is the graph of which function?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4