Solve the Problem $x=a . f(x)=2 x+10, a=3$
A) 6
B) -6
C) 16
D) 2

Solve the problem.
-Compute the instantaneous rate of change of the function at at $x=a . f(x) =2 x+10, a=3$ .

A) 6
B) -6
C) 16
D) 2