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A doctor is studying heights of newborn babies. The doctor uses 20 inches as a reference point. Babies in the study receive a score to show how close they are to 20 inches.

A baby that is 21 inches long receives a score of +1.

A baby that is 18 inches long receives a score of

1 answer

To calculate the score for a baby that is 18 inches long based on the reference point of 20 inches:

  1. Determine how far the baby's length (18 inches) deviates from the reference point (20 inches).
  2. The difference is: 18 inches - 20 inches = -2 inches.

Since the scoring system assigns scores based on the distance from 20 inches, with the standard being that a baby measuring higher than 20 inches receives a positive score (e.g., +1 for 21 inches), we can conclude that a baby measuring lower than 20 inches receives a negative score.

Thus, the baby that is 18 inches long would receive a score of -2.