() The figure below shows f(a) and its linear approximation at x=a, y=2x-3. (The linear approximation is shown in blue.) (a) What is the value of a? a (Click on the ima (b) What is the value of f(a)? f(a) = (c) Use the linear approximation to approximate the value of f(2.2). f(2.2)= (d) Is the approximation an under- or overestimate? The approximation is an ? estimate. 2 I I