A scientific electronic calculator includes a display unit which performs display by a plurality of dots and a CPU which displays X and Y axes on the display unit and displays scales on the X axis at predetermined scale intervals. The CPU displays a graph in a coordinate system determined by the X and Y axes moves the trace pointer on the graph dot by dot in an X-axis direction according to a user operation, and displays coordinate values of the trace pointer on the display unit, while displaying a trace pointer on the graph The CPU sets a numerical width of the X axis in such a way that a value obtained by dividing the numerical width of the X axis by a scale interval is one N-th of the number of dots in an X-axis direction, the N which is an integer, and displays the X axis.