Absolute Value Function
This is the Absolute Value Function:
f(x) = |x|
It is also sometimes written: abs(x)
This is its graph:
f(x) = |x|
It makes a right angle at (0,0)
It is an even function.
Its Domain is the Real Numbers:
Its Range is the Non-Negative Real Numbers: [0, +∞)
Piecewise
It is also a Piecewise Function:
Plot the graph here