The function is .
Consider the first expression for .
Construct a table for different values of , where .
Observe the expression :
for .
Since is equal to , represent the point with a dot.
Consider the second expression for .
Construct a table for different values of , where .
Observe the expression :
for .
Since is not equal to , represent the point and with a Circle.
Consider the second expression for .
Construct a table for different values of , where .
Observe the expression :
for .
Since is equal to , represent the point with a dot.
Graph:
Graph the function for , for and for .
Represent the point and with a circle.
Represent the point and with a dot.
Observe the graph:
Domain is set of all real numbers .
Range is all real numbers.
Graph of the function is
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