Modulus of a Function

What is Modulus of a Function?

The graph of y equals the modulus of f of x is obtained from the graph of y equals f of x by keeping every part that lies on or above the x-axis unchanged and reflecting every part that lies below the x-axis in the x-axis. Roots are unaltered, no output is ever negative, and a cusp appears wherever a reflected section meets the axis.

This definition is part of the Functions chapter in Cambridge O Level Additional Mathematics.

Concepts related to Modulus of a Function

• reflection
• cusp
• roots