Let's denote the elevation of Point A, which is below sea level, as \( -d \), where \( d \) is a positive distance below sea level. Therefore, Point A can be represented as:
\[ \text{Point A} = -d \]
Given that Point B is plotted above 0 at a distance exactly equal to the distance of Point A from 0, we can determine the distance of Point A from 0. The distance from 0 to Point A is:
\[ \text{Distance of Point A from 0} = | -d | = d \]
As Point B is positioned \( d \) units above 0, we find the elevation of Point B to be:
\[ \text{Point B} = 0 + d = d \]
Thus, we can summarize the relationships between Points A and B:
- Point A is below sea level and negative, for example, \( -d \) if \( d = 500 \) would be \( -500 \).
- Point B is directly above sea level and positive, at the same numerical distance from 0, for example, \( d \) would be \( 500 \).
- Point B is the positive counterpart of Point A in terms of distance from 0 on the number line.
In conclusion, the values can be summarized as follows:
- \( \text{Point A} = -d \)
- \( \text{Point B} = d \)