What is the average rate of change in the noise level

Reference no: EM131012001

Freeway noise lessens as the distance from the freeway increases. Some readings are shown in the table below.

Distance (yards)	Noise (decibels)
60	140
70	110
90	10

What is the average rate of change in the noise level as you go from 70 to 90 yards away from the freeway?

Reference no: EM131012001

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