Exercise from textbook:
Sketch the curves of the given function:
y = sqr x; x equal to or greater than 0
y = sqr 2x - 5, x equal to or greater than 5/2
For example when y = 3; x = 7
But I have been unable to 'undo' the equation- what if have y = 3 how does one determine x = 7 ?
This provides an explanation of finding a y value given an x value.