Answer
Appendix C – 27 (Answer)
Refer to the line y = $\sqrt{x}$ in Graph I, it is a function.
The domain is $[0, \infty)$ and
the range is $[0, \infty)$.
Work Step by Step
Appendix C – 27 (Solution)
Refer to the line y = $\sqrt{x}$ in Graph I, it is a function because one corresponding value of y can always be found for any choice of x in the domain of $[0, \infty)$, and,
by way of Vertical Line Test, each vertical line drawn will not intersect the line on the graph in more than one point, so, the equation defines a function further.
x can only be represented by any real number with domain = $[0, \infty)$ since the radical must represent a non-negative number, and
y will be any real number with range = $[0, \infty)$.
