a. Write the equation of the line that represents the linear approximation to the following function at the given point a. b. Use the linear approximation to estimate the given quantity. [ approximation - exact c. Compute the percent error in the approximation, 100 . where the exact value is given by a calculator. exact X f(x) = X + 1 : a=1; f(1.2) a. L(x) = (Use integers or fractions for any numbers in the expression.) b. Using the linear approximation, f(1.2) ~ 0.55 (Round to three decimal places as needed.) c. The percent error in the approximation is % (Round to three decimal places as needed.)