points_on_line = []
for idx, point in enumerate(segment):
    result = is_on_line(
        endpoint_1_x=segment[0].x,
        endpoint_1_y=segment[0].y,
        endpoint_2_x=segment[-1].x,
        endpoint_2_y=segment[-1].y,
        coord_x=point.x,
        coord_y=point.y,
        error_margin=0.1,
    )
    points_on_line.append((point, result,))

for point, on_line in points_on_line:
    # figure out where your curves are