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### Using Visual Formula

Use Visual Formula to implement a linear equation involving an absolute value. Toward this end, generate a graph that shifts the vertex of the graph to the left on the x axis 4 units. Here is the equation that accomplishes this task:

y = |4 + x|

To implement the equation, refer to Figure 7.11 and use the following steps:

1. Double click the menu item for absolute values (|| Abs). Then click in the equation composition area to position the absolute value bars. Use the mouse cursor to pull the bars for the absolute value area far enough apart to accommodate two value fields and a plus sign (see Figure 7.11).

2. Click the Value menu item. Position the field just to the right of the left absolute value bar. Click in the field and type ...

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