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Which situation results in a change that could be modeled by a positive number?

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(1 point)
• a change in elevation from sea level to -87 feet
• a change in elevation from 492 feet to -783 feet
• a change in elevation from 632 feet to 312 feet
• a change in elevation from -12 feet to 123 feet

1 answer

To determine which situation results in a change that can be represented by a positive number, we need to look for a situation where the difference or change in elevation is positive.

Let's analyze each option:

  1. A change in elevation from sea level to -87 feet: This is a change to a lower elevation, so it would be negative.

  2. A change in elevation from 492 feet to -783 feet: This is also a change to a lower elevation, resulting in a negative change.

  3. A change in elevation from 632 feet to 312 feet: This is a decrease in elevation; the change would be 312 - 632 = -320 feet, which is negative.

  4. A change in elevation from -12 feet to 123 feet: Here, the change is 123 - (-12) = 123 + 12 = 135 feet, which is positive.

Therefore, the situation that results in a change that could be modeled by a positive number is:

  • A change in elevation from -12 feet to 123 feet.