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Calculator Tips for Pre-Calculus
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Finding the Points of Intersection of Graphs

The following instructions apply to a TI83 or TI84 graphing calculator.

First place the equation into 'y1=' and 'y2=' and graph the equations. Then adjust the window so that the turning point(s) are shown on the screen.



Key strokes:
  1. '2nd'
  2. 'trace'
  3. Hit '5' for intersect.
  4. The calculator is saying 'First curve'. Move the cursor really close to the point of intersection and hit enter.



  5. The calculator is saying 'Second curve'. Hit enter.



  6. The calculator is saying 'Guess'. Hit enter again.



    This is one of the points of intersection of the two equations. (-.449, -2.449)
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