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Graphing Absolute Value Functions

Graphing Absolute Value Functions 1.16 - Solution

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To draw the graph of we will make a table of values. To do so, we will assign random values to the variable and calculate the corresponding values of Let's do it!

Now, we will plot and connect the obtained points. Do not forget that an absolute value function has a V-shaped graph.


The vertex of an absolute value function is the point at which its graph changes direction. Consider our graph, paying close attention to the coordinates of the vertex.

We see above that the vertex of the graph is the point


Let's consider our graph again.

Note that the variable can take any value. Conversely, the variable takes values which are less than or equal to With this in mind, we can write the domain and range of the function.


The intercepts occur at the points at which the graph intersects the axis. Similarly, the intercept occurs at the point at which the graph intercepts the axis. Let's observe these points on the graph.

We see above that the intercepts are and and the intercept is