Operations:   Graphing Inequalities


Shading above or below a graph can be done by accessing the Y= menuwpeB.jpg (4867 bytes)

  1. Press Y= and enter the desired function.  For example:
  2. Use the left-arrow key to move the cursor to the far left.
  3. Press the enter key twice.  wpeD.jpg (4812 bytes) The triangle is blinking.
  4. Press Graph to see it.   This is the GREATER THAN option.  The graph should look like this:wpeE.jpg (4864 bytes)
  5. Go back to the Y= screen and press ENTER again.  This is the LESS THAN option.wpeF.jpg (4804 bytes)  wpe10.jpg (5764 bytes) 
  6. Graph inequality SYSTEMS the same way  wpe12.jpg (5015 bytes) wpe13.jpg (6251 bytes) Notice that the calculator changes the shading so that the solution to the system is visible.


    HINT:  The graph cannot distinguish between "less than" and "less than or equal to" graphs.  The same for "greater than" and "greater than or equal to" graphs.