Integer Representation of Sea Levels

In this mathematics class, the teacher explains how to represent heights above and below sea level using integers. Positive integers denote heights above sea level, while negative integers represent depths below sea level. The class covers four examples: 200 meters above sea level, 100 meters below sea level, 10 meters above sea level, and sea level itself. The teacher provides solutions for each example, emphasizing the use of positive and negative integers. The session concludes with a recap of the solutions and a thank you to the viewers.

Which of the following is a positive integer?

• 0

• -100

• +50

• -50

What is the integer representation of a height 200 meters above sea level?

• +100

• +200

• -200

• 0

If a place is 200 meters above sea level, which integer would you use?

• 0

• -200

• +100

• +200

Which integer represents a height of 300 meters above sea level?

• -300

• +200

• +300

• 0

How would you represent a depth of 100 meters below sea level using an integer?

• 0

• -100

• +100

• +10

What does a negative integer indicate in the context of sea level?

• None of the above

• Below sea level

• Above sea level

• At sea level

What integer would represent a depth of 50 meters below sea level?

• +10

• +50

• -50

• 0

What integer would you use for a location 150 meters below sea level?

• +150

• +10

• -150

• 0

What integer would you use for a depth of 20 meters below sea level?

• +10

• 0

• -20

• +20

What integer would you use to denote a location 250 meters below sea level?

• 0

• +250

• -250

• +100