Final answer:
In the Kendall and Daniels & Worthingham scales, the scores in the horizontal plane represent the values along the x-axis and the scores in the vertical plane represent the values along the y-axis.
Step-by-step explanation:
In the Kendall and Daniels & Worthingham scales, the scores in the horizontal plane represent the values along the x-axis or from left to right in a coordinate system. The scores in the vertical plane represent the values along the y-axis or from bottom to top in a coordinate system.