O -12 -10 -8 -6 2 4 6 8 10 12 JOURWNN Given is the process of f (x) falling on the lower image and you are asked to draw on it with a ruler (note the pencil if something goes wrong and get used to it). a) Draw the tangent on the figure for x = 9 and explain in a few words what this line tells us about the trajectory of the curve f (x). b) In interpreting f(9) it is said that the result gives about the change of the curve when x is increased by 1. Why is the context like that? Describe and draw the illustration to explain the subject under discussion. C) Draw the secant lines between x = 9 and x = 6.5 on the one hand and x = 9 and x = 7 on the other. d) What is the use of these formulas when discussing the instantaneous rate of change of x = 9