he height of a trail in metres, d(x), is represented by d(x)= x 2
+7
3x−5
​
where x is the horizontal distance from the ranger station in kilometres (west = negative values, east = positive values). Calculate the average rate of change in height from 2 km west of the ranger station to 4 km east of the ranger station. Round your answer to 2 decimal places. NOTE: a written solution is required on paper. −1.47 m/km 1.41 m/km 0.22 m/km −1.43 m/km −0.29 m/km 0.26 m/km