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
part b
select from the drop - down list to complete each statement.
the elevation of town b is ▼ above sea level.
the elevation of town f is 100 feet higher than the elevation of town c. the point for town f is located at ▼ on the number line.
the elevation of town g is below sea level. the point for town g could be located at ▼ on the nu
select
-100
-40
40
100

Explanation:

Part A

In elevation contexts, 0 represents sea level (the reference point). Negative values indicate positions below sea level, so -15 means 15 feet below sea level.

Step1: Town B elevation logic

Since town B is above sea level, its elevation must be a positive number. From the options, the only positive value is 40.

Step2: Town F elevation calculation

Town F is 100 feet higher than town C. First, assume town C's elevation is at sea level (0, as a standard reference if not given otherwise). Calculate town F's elevation: $0 + 100 = 100$.

Step3: Town G elevation logic

Town G is below sea level, so its elevation must be a negative number. From the options, the valid negative value is -40.

Answer:

• The number 0 represents sea level (the reference elevation for the towns).
• The number -15 represents that town E is 15 feet below sea level.

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Part B