Chapter 5.4, Problem 30MS

Here we celebrate the power of algebra as a powerful way of finding unknown quantities by naming them, of expressing infinitely many relationships and connections clearly and succinetly, and of uncovering pattern and structure.

For all $y$

? Look at the graphs for the previous Mindscape. Which functions have the property that you could pick any value, call it b, between 0 and 2 on the $y$

-axis and find a value on the $x$

-axis, call it a, so that the b is the value corresponding to a?