Question

part a
riley plots a point for town d at 0. he plots a point for town e at -15. describe what the numbers 0 and -15 represent in this situation.
(there is a number line image with town b at 20, 0, and town c at -60, and other marks -20, -40, -80, -100)

Explanation:

Looking at the number line, Town B is at +20 and Town C is at -60, so positive values represent positions in one direction from a reference point, and negative values represent positions in the opposite direction. The number 0 is the reference point (origin) on the number line, so Town D is located at this central reference point. The number -15 is a negative value, so Town E is located 15 units in the direction opposite to where Town B is plotted, between the origin (0) and Town C (-60).

Answer:

The number 0 represents the reference point (origin) on the number line, so Town D is at this central starting location. The number -15 represents a position 15 units in the direction opposite to Town B (the positive direction), meaning Town E is located between the origin (0) and Town C (-60) on the number line.