Modulus of a linear function

What is the modulus of a function?

The modulus (or ‘absolute value’) of a function makes all the negative values positive.

This means that the y values of the graph will never be negative.

Representing modulus

We write the modulus (or ‘absolute value’) of a function like this: y = |f(x)|.

Graph of the modulus of a linear function

The graph of the modulus of a linear function y = |mx + c| looks like a ‘V’ shape.

That’s because the part of the graph where mx + c is negative is reflected above the x-axis.

flashcards

QuestionAnswer
What is the modulus (or absolute value) of a function?The modulus makes all the negative values of the function positive, so the y values of the graph will never be negative.
How do we write the modulus of a function?We write it as $y =
What shape does the graph of $y =mx + c
Why does the graph of $y =mx + c