Hey guys im gagan today we learned or reviewed for some students about Domain and Range. There are three ways to find Domain and Range. 1 Set Notation 2 Number line 3 Interval Notation. In number line and open circle indicates the number is excluded and a solid circle indicates the number is included. and for Interval Notation a round bracket indicates that the number is excluded, and a solid circle indicates the number is included. We also did a few examples and in the end we got a domain and range work sheet in which we had to state the domain, range of the points on the graph. And we were also assigned 4 questions for home work which are in the Unit book. I still do not understand it Mr P i need help !!!!!!!!!!