Here is a simple parabola.
Its equation is y = x2 - 3
Again there is a portion of this graph that is negative. It looks like everything on the graph from x values of about -1.7 to +1.7
When we apply the absolute value bars to this function, the curved part of the parabola that is below the X axis will reflect upwards. Have a look below.
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On the right you will see the graph of the function y = |x2 - 3|
All of the negative values of this function have become positive.
The portion below the X axis has been reflected above the axis.
Is this easy, or what?!?
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... now let's look at a cubic function
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