In order to find an intersection point, first graph two functions.
For this example, let 
and 
.
The graphs of the functions in a standard window are shown below.
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The intersection point of the two lines is not visible using a standard window. Zoom out once so that the intersection point is visible. (Remember to press ENTER for the zoom out to happen). Now press 2nd and then TRACE [Calc] to get the CALCULATE menu. Select 5:intersect.
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If the cursor is not near the intersection point, move it close to the point of intersection using the ARROW keys, then press ENTER.
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When Second curve? appears, press ENTER again. When Guess? appears, press ENTER once more.
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The final screen shows that the intersection point is (7,11). If there are more points of intersection, move the cursor near each one and repeat the process.
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