Mean absolute deviation is the average of the sum of all deviations of the terms from the average of the terms...
mean=(5+9+9+11+16)/5=10
mad=[(10-5)+(10-9)+(10-9)+(11-10)+(16-10)]/5=2.8
Negative 72.75 is your product. It is very simple once you understand it.
I’m pretty sure it’s B. -3/8x - 1/4 :).
