Question

What is the domain of the square root function graphed below?

Answer 1

Answer:

x ≥ 0

Step-by-step explanation:

The function is graphed starting at 0 and going up the positive x-axis.

These are numbers that are greater than 0; thus the domain is greater than or equal to 0, or

x ≥ 0

Answer 2

You can see that the function is graphed for every number x that is greater than or equal to zero.

So we write that the domain is $x \leq 0$.