Go to the Wolfram Alpha site and type the following in the input box:
|x|
Chat with our AI personalities
That is a result of an absolute value equation. So an Absolute Value Graph
No.
It is sometimes the point where the value inside the absolute function is zero.
y = |x| - 2
the absolute value of any number is always the positive value of that number absolute value of 0.4 = 0.4