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Here is an example of how to find the vertex of y=(x+1)2 + 2 by graphing.

First enter (x+1)2 + 2 into Y1 and graph it (press Y=, enter the equation, and then press GRAPH).

You should be able to see the vertex (if not press ZOOM, then ZStandard to reset back to the standard viewing window.) You need to know if the vertex is a minimum or a maximum. In this case, it is a minimum. Press 2ND CALC (above TRACE) and select minimum. (You would select maximum if the vertex were a maximum.

The calculator will ask for a left bound. Use the left arrow key to move the flashing start to the left of the vertex and then press ENTER. The calculator will then ask for a right bout. Move the flashing star to the right of the vertex and then press ENTER. The calculator will then ask for a guess. Move the flashing star close to the vertex (between the bounds you set) and pres ENTER.

Then calculator will then display the coordinates of the vertex. In this case, it will say that x is -1 and y is 2.

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