Question

What are the domain and range of the function below?

Answer 1

ANSWER

Domain:
$x \geqslant 0$

Range:
$y \leqslant 4$

EXPLANATION

The domain refers to the values of x for which the function is defined.

The least value of x is 0.

Therefore the domain is $[0,\infty]$.

or

$x \geqslant 0$

The range refers to values of y for which x is defined.

The highest value on the y-axis that the graph can attained is 4. The function decreases without bound.

There the range is $(- \infty,4]$.

or

$y \leqslant 4$

Answer 2

The Answer is B.

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