Horizontal line test
-Used to determine if the inverse is a function. Done on original function.
If graph passes the test then the inverse is considered to be a function.
One-to-One
-If function passes both the vertical and horizontal line test.
Find the inverse:
*Switch the x and y variables in the equation.
*Solve equation for y.
1. Get every
term with a y
on one side.
Get any term
without a y
to the
opposite
side.
Factor out the y
Determine if equation is a function. Determine if the inverse is a function.
So is it one-to-one.