This graph represents the basic square root function reflected about the x-axis. Notice that the negative sign occurs outside of the square root symbol.

The anchor points
(0,0) (1,1) (4,2)
become
(0,0) (1,-1) (4,-2).
The y component of each coordinate reflects to its opposite sign.

Click on "original function" above to compare this graph to the basic cube graph.




A negative sign inside the square root symbol will result in a reflection about the y-axis. Unsure of reflection? Read about graphing using transformations.