1. [1/3 Points] DETAILS PREVIOUS ANSWERS TANAPCALC9 3.7.016. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Let f be the function defined as follows. y = f(x) = 8x2 - 4x + 6 (a) Find the differential of f. dy = (16x - 4) dx (b) Use your result from part (a) to find the approximate change in y if x changes from 2 to 1.97. (Round your answer to two decimal places.) dy = 0.48 X (c) Find the actual change in y if x changes from 2 to 1.97 and compare your result with that obtained in part (b). (Round your answer to two decimal places.) Ay = 0.83 X