Definition of Function. Argument and Vaule of a function. Domain of a function. Image of a function. Zero of a Function. Monotonicity of a Function. Maximum and minimum value of a Function. Injective Function. Even and Odd Functions. Periodic function. Shift the graph of a function along x and y axis. Reflection with restpect to the x and y axis. Graphs of Functions y = |f(x)| and y = -f(-x). Shift the graph of a function by a vector.