??? - 2013 JUNE Q5
5.
Fig. 5 shows the graph of y = 2x .
(i) On the copy of Fig. 5, draw by eye a tangent to the curve at the point where x = 2. Hence find an estimate of the gradient of y = 2x when x = 2. [3]
(ii) Calculate the y-values on the curve when x = 1.8 and x = 2.2 Hence calculate another approximation to the gradient of y = 2x when x = 2. [2]
(i) On the copy of Fig. 5, draw by eye a tangent to the curve at the point where x = 2. Hence find an estimate of the gradient of y = 2x when x = 2. [3]
(ii) Calculate the y-values on the curve when x = 1.8 and x = 2.2 Hence calculate another approximation to the gradient of y = 2x when x = 2. [2]