O'Reilly logo

Beginning Pre-Calculus for Game Developers by Boris Meltreger, John P. Flynt

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Absolute Values

The absolute value of a number corresponds to two values, one positive, the other negative. Because the graphs you create using absolute values depict both of these values, they are reflected across the y axis.

Here is an equation involving an absolute value that equates the absolute value of x with y:

y = |x|

For each value on the y axis, you find corresponding negative and positive values of x. Figure 10.10 illustrates a graph of an equation that does not involve an absolute value (y = x). To the right of the graph of this equation, you see the graph of an equation that contains an absolute value. The darkened arrow emphasizes how the negative values of x generate positive y values. From this arises a typical V representation ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required