A graph line is a visual representation of data that is composed of an x-AXIS, y-AXIS, and a CURVE. The x-AXIS is the horizontal line on the graph, while the y-AXIS is the vertical line. The CURVE is the line that connects the points on the graph. The term 'graph line' can also refer to the axes, with the x-AXIS being abbreviated as 'XAXIS' (5 letters) and the y-AXIS being abbreviated as 'YAXIS' (5 letters). Additionally, the CURVE can be referred to as 'CURVE' (5 letters) or 'AXIS' (4 letters).