Definition: inverse of $y=f(x)$ → $x=f^{-1}(y)$
Example: inverse of $y=x^2$ → $x=\pm\sqrt{y}$
Definitions:
range: set of values the dependent variable can take
domain: set of possible values for the independent variable
Definition:
When the function touches either the x or y axis
y intercept: $f(0)=y$
x intercept: $f(x)=0$
Definition:
an even function is when $f(x)=f(-x)$ [mirror on the y axis]
an odd function is when $f(x)=-f(-x)$ [axial symmetries on the x axis]
if y and x are interchangeable then it is symmetrical on the axis x=y
3 types: horizontal, vertical and oblique asymptote
ways to find them: find limits, use long division