The range of the function shown in the graph are all real numbers.
What is the range of a function?
The range of a function is the set of its possible output values.
The range of a function are the dependent variables.
In other words, the range of a function is the complete set of all possible resulting values of the dependent variable (y), after we have substituted the domain or independent variable.
According to the values of y on the graph the range are all real numbers.
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