Chapter 0 - Before Calculus - 0.4 Inverse Functions - Exercises Set 0.4 - Page 45: 4

a) Yes b) Yes Check attached files

The horizontal line test confirms that the functions are one-one. a) is pretty straightforward: the graph shows that the function is one-one: no horizontal line can be found such that it intersects the graph at two points. b) We see that the only point of intersection on the x-axis (when x = 0) is at y = 1 (point: 1,0).