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

Question

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(1 point)
Responses

a change in elevation from 632 feet to 312 feet
a change in elevation from 632 feet to 312 feet

a change in elevation from –12 feet to 123 feet
a change in elevation from –12 feet to 123 feet

a change in elevation from sea level to 87 feet
a change in elevation from sea level to 87 feet

a change in elevation from 492 feet to 783 feet

Answer 1

The situation that results in a change that could be modeled by a negative number is:

a change in elevation from 632 feet to 312 feet.

This is because the change in elevation involves a decrease of 320 feet (632 - 312 = 320), which could be represented as a negative change.

Answer 2

Sebastian was in a hotel lobby and took the elevator up 7 floors to his room. Then he took the elevator down 9 floors to the parking garage. He described his movement with the expression below.9+(−7)  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 once per question.(1 point)ResponsesSebastian should have started at zero before adding –7.Sebastian should have started at zero before adding –7.Sebastian should have used –9 and 7.Sebastian should have used –9 and 7.Sebastian should have used 0 and –9.Sebastian should have used 0 and –9.Sebastian should have switched the two addends and written −7+9.