POLYNOMIAL FUNCTIONS Solving Polynomial Equations (Page 5 of 6)

The least common denominator of all the values in the list of possible rational zeros is 9. Set Xscl=1/9. Thus, each tick mark on the x-axis will represent one-ninth unit. Adjust the WINDOW accordingly and re-graph.

 WINDOW key....

 GRAPH key.

 Calculator screen image. Calculator screen image.

By counting tick marks, we see the zero appears to be 6/9, which reduces to 2/3. Now use CALC value again to verify if this is a zero.

 2nd CALC key. 1: menu selection. 2 Divide key. 3 ENTER key. Calculator screen image.
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