Understanding Proportional Relationships and Elevation Changes

The video covers a math lesson on changing elevation, focusing on solving problems with signed numbers. It includes activities like 'Cliffs and Caves' to illustrate positive and negative changes in elevation. The lesson also covers adding rational numbers and using number lines. The session concludes with homework on proportional relationships and practice problems.

What is the opposite of a temperature increase of 5 degrees?

• An increase of 10 degrees

• A decrease of 5 degrees

• An increase of 5 degrees

• A decrease of 10 degrees

If a climber starts at 400 ft and descends 150 ft, what is the final elevation?

• 150 ft

• 400 ft

• 550 ft

• 250 ft

In the 'Cliffs and Caves' activity, what is the result of adding -200 and 200?

• -400

• 0

• 400

• 200

What is the final elevation if a spelunker starts at -200 ft and ascends 100 ft?

• 100 ft

• -300 ft

• -100 ft

• 0 ft

What does the expression -75 + 100 represent in terms of elevation?

• Starting 100 ft below ground and ascending 75 ft

• Starting 75 ft above ground and descending 100 ft

• Starting 100 ft above ground and descending 75 ft

• Starting 75 ft below ground and ascending 100 ft

What is the sum of -35 and 35?

• 35

• 70

• -70

• 0

When adding two numbers with different signs, what should you do?

• Add their magnitudes

• Subtract their magnitudes

• Multiply their magnitudes

• Divide their magnitudes

If a table shows a constant proportionality of 4/5, what does this indicate?

• The relationship is linear

• The relationship is proportional

• The relationship is exponential

• The relationship is not proportional

What is the result of adding -9.2 and 4.4?

• 4.8

• -4.8

• 0

• -13.6

How do you calculate a 5% increase on a value G?

• G - 0.05G

• G + 0.5G

• G + 0.05G

• G - 0.5G