 graf1. In algebra, an idea may be expressed in
many ways.
 Here words, symbols, numbers, and a graph are required.

 1st: Complete the table using symbols & numbers.

Written words:  a number 
one more than a number 
one less than a number 
Written symbols: 
x   
Usings numbers: 

0   
1   
2   
3   
1   
2   
1/2   

 2nd: The graph for "a number" has been completed for you.
 Use the table above and the plane below to complete
 the two remaining graphs.

 3rd: How are the other two graphs similar & different
 from the graph of "a number?"
