Please show work :) thannk you
(5 points) Given the function r(t) = 6− 24 t and the values t = 6,t = 12.
(a) Determine the net change between the given values.
(b) Determine the average rate of change between the values
a.
Net change = r(12) - r(6) =
[ 6 - 24*12 ] - [ 6 - 24*6 ] =
-24 ( 12) + 24(6) = -144
b.
Avg rate of change = Net Change / [ 12 - 6] = -144/6 = -24
+318 
