Question

Which situation results in a change that could be modeled by a positive number? NOTE: There is a check answer button in the bottom right corner. Click this to check your answer before moving on to the next question. It will not tell you the correct answer, but it will tell you if the answer you selected is correct. You can use this feature twice per question.(1 point)Responsesa change in elevation from –12 feet to 123 feeta change in elevation from –12 feet to 123 feeta change in elevation from 632 feet to 312 feeta change in elevation from 632 feet to 312 feeta change in elevation from 492 feet to -783 feeta change in elevation from 492 feet to -783 feeta change in elevation from sea level to -87 feet

Answer 1

To determine which situation results in a change that could be modeled by a positive number, we need to focus on the change in elevation calculated as the final elevation minus the initial elevation.

1. Change in elevation from –12 feet to 123 feet: \[ 123 - (-12) = 123 + 12 = 135 \quad (\text{Positive change}) \]

2. Change in elevation from 632 feet to 312 feet: \[ 312 - 632 = -320 \quad (\text{Negative change}) \]

3. Change in elevation from 492 feet to -783 feet: \[ -783 - 492 = -1275 \quad (\text{Negative change}) \]

4. Change in elevation from sea level (0 feet) to -87 feet: \[ -87 - 0 = -87 \quad (\text{Negative change}) \]

Based on this assessment, the only situation that results in a positive change is:

• A change in elevation from –12 feet to 123 feet (135 feet positive change).

So, the correct response is the first one: a change in elevation from –12 feet to 123 feet.