Steps 
Key Sequence 
Screens 
1. Input Equation into Y1 
Press DIAMOND key, then F1 key (for Y=) 


Type the function 

2. Graph 
Press DIAMOND key, then F3 key 

3. Find Inflection Point 
Press F5 


Press 8 (for Inflection) 


Type in xvalue for a point to the left of a suspected inflection point or trace function until you reach the value for x 


Press ENTER 


Type in xvalue for a point to the right of a suspected inflection point or trace function until you reach the value for x 


Press ENTER 

Note: In this case, the inflection point is (0.666667, 4.40741). 