The image shows a plot of a curve with a red and green curve on a white background. The text written on the image reads "Figure 1.1.2.2 of the fourier curve". The curve is composed of two curved lines, one in red and one in green, that intersect at various points on the x-axis and the other at the y-axis. The red line is curved to the left and the green line is straight to the right, indicating the relationship between the two points.