Question

janna is making a prediction of the frequency of a key that is 12 keys from middle c. which best describes her prediction? interpolation, because a key that is 12 keys from middle c is within the data set interpolation, because a key that is 12 keys from middle c is outside the data set extrapolation, because a key that is 12 keys from middle c is within the data set extrapolation, because a key that is 12 keys from middle c is outside the data set

Explanation:

To determine if it's interpolation or extrapolation, we check the data set. The "Number of keys above middle C" in the data are 0, 1, 2, 4, 8. A key 12 keys from middle C is not in this set (12 > 8). Interpolation is for values within the data range, extrapolation for outside. Since 12 is outside the data (max in data is 8), it's extrapolation.

Answer:

D. extrapolation, because a key that is 12 keys from middle C is outside the data set