Graph Not Displaying / Blank Graph Screen

How to Fix It

1. Reset the View Window to initial settings.

   Press SHIFT + F3 (V-Window) then press F3 (STD) to set the standard view window. Alternatively, use ZOOM > Initial (or Zoom Auto) to reset the graphing area to include the most common range. If the graph appears after this, the previous V-Window was set outside the function's visible range.

2. Check that the function is selected for drawing.

   In the Graph mode function list, each Y= entry has a highlight toggle. Scroll to your function and press F1 (Sel) to toggle whether it is selected for graphing. If the function is not highlighted (selected), pressing DRAW will show a blank screen even if the equation is entered correctly.

3. Verify the function is entered correctly.

   Press MENU > Graph and check the Y1 entry. The function should be entered as Y1 = followed by the expression using the calculator's specific syntax. For example: Y1 = 3X^2 + 2X - 1 A syntax error in the function entry causes the graph to not plot even with correct window settings.

4. Use Zoom Auto to fit the graph.

   On the Casio fx-9750 or fx-CG50, after pressing DRAW, press SHIFT + F2 (Zoom) > F5 (Auto) or F6 (Zoom Auto). This automatically adjusts the V-Window to fit the function into the screen. Use this whenever you are unsure of the appropriate range for a new function.

5. Clear any conflicting graphs in the function list.

   Scroll through all Y= entries in Graph mode. If multiple functions are selected (highlighted), one may be outside the viewing area while another is visible. Deselect all functions with F2 (Del-A to delete all) and re-enter only the function you want to graph.