Patent ID: 8259115

Claim:
A graph display apparatus comprising: an image and graph formula storage unit configured to store image data and a model graph formula corresponding to the image data; an image display control unit configured to cause a display unit to display the image data stored by the image and graph formula storage unit; a formula input unit configured to input a graph formula according to a user operation; an input graph display control unit configured to cause the display unit to display a graph corresponding to the graph formula input by the formula input unit, on the image data displayed on the display unit by the image display control unit as a background image; and a model graph display control unit configured to cause the display unit to display, in a different display mode, a graph corresponding to the model graph formula stored by the image and graph formula storage unit, together with the graph displayed on the image data as the background image on the display unit by the input graph display control unit, according to a user operation.