Exercise 1.7.18
The solid line is \(y=\sqrt{x}\) and the dashed line is \(y=-\sqrt{x}\) [ that is, \(-y=\sqrt{x}\) ].
Replacing \(y\) with \(-y\) reflects the graph about the \(x\)-axis.
The solid line is \(y=\sqrt{x}\) and the dashed line is \(y=-\sqrt{x}\) [ that is, \(-y=\sqrt{x}\) ].
Replacing \(y\) with \(-y\) reflects the graph about the \(x\)-axis.