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# Solve An Inequality Graphically

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For math class.

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### Transcript of "Solve An Inequality Graphically"

1. 1. Using a Graphing Calculator<br />Solve an Inequality Graphically<br />
2. 2. Question???<br />Solve sinx &gt; logx. <br />
3. 3. Step 1: Insert Equations<br />
4. 4. Step 2: Graph Equation<br />Change zoom settings to fit the intercepts between functions on the screen.<br />
5. 5. Step 3: Find Intercepts Between Graphs<br />Press [2nd] [TRACE] and select [intersect].<br />Press enter on each side of the intercept you want to calculate.<br />
6. 6. Step 4: Repeat the last step for all intercepts. Records results.<br />Intercepts at points:<br />(2.70, 0.43), (7.33, 0.87), and (8.26, 0.92)<br />
7. 7. Step 5: Look at the graph and record intervals where sinx &gt; logx.<br />(0, 2.70) (7.33, 8.26) <br />
8. 8. Step 6: Check results.<br />Re-enter the equations, this time as an inequality. To get the symbol &gt; press [2nd] [MATH]. Then select the symbol.<br />
9. 9. Step 9: Change settings.<br />Press [MODE], select [Dot].<br />
10. 10. Step 10: Graph and Trace<br />The calculator plots y-value 1 when the inequality is true. If you press [TRACE] you can then scroll to the end point and check you answers.<br />
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