Final answer:
The number line shows addition and represents the addition of a positive number. An example word problem about elevation would involve adding the starting elevation and the change in elevation to find the new elevation.
Step-by-step explanation:
The number line shows addition. Addition is the operation of combining two or more numbers to find the total or sum. In this case, the number line represents the addition of a positive number.
An example of a word problem about elevation that matches the addition equation could be: If a hiker is at an elevation of 100 feet and climbs 50 feet, what is their new elevation? The addition equation for this problem would be 100 + 50 = 150. So, the hiker's new elevation is 150 feet.
Keywords: addition, number line, elevation, word problem, sum