What is the range of the function on the graph

The range of the above function is [-3,∞], or set of all the real numbers greater than or equal to three.
The range is a set of elements representing the dependent variable y.
In a graph, to find range we need to look at the lowermost point and the uppermost point on the graph in the y-direction.
In the given graph,
The lowermost point lying on the graph in the y-direction is -3 while the uppermost point does not exist because function tends to infinity as x tends to infinity.
Therefore, the range of the above function is [-3,∞], or set of all the real numbers greater than or equal to three.
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