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.
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.
If the cursor is not near the intersection point, move it close to the point of intersection using the ARROW keys, then press ENTER.
When Second curve? appears, press ENTER again. When Guess? appears, press ENTER once more.
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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