To estimate $~2(0.95)^3 -3(0.95)~$ using a local linear approximation, we need to choose an appropriate function $~f~$ and a point on $~f~$ where $~x=a\,$. What function should we choose for $~f(x)~$ and what value should we choose for $~a\,$? $f(x)=$ [[☃ expression 1]] $a=\,$[[☃ math-keypad 1]]