Learn how to evaluate the definite integral of absolute value by graphing

The video tutorial discusses the limitations of using antiderivative rules in certain cases and suggests sketching the absolute value graph instead. It explains how to calculate the areas of triangles using base and height, and how these areas can be used to find the definite integral of a function. The tutorial emphasizes understanding the properties of graphs and applying geometric concepts to solve integration problems.

What does the teacher mean by 'sketch the absolute value graph'?

Explain why the area of the left triangle is considered positive.