The function in this graph is constant in the range of -4 ≤x≤-2 , Option D is the correct answer.
What is a function ?
A function is a mathematical statement which identifies relation between independent and dependent variable.
A graph is given
The graph will be considered constant when the y value is constant for any value of x
The value of y is constant in the range of
-4 ≤x≤-2
Therefore Option D is the correct answer.
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