A tank is being emptied. at a constant rate. The capacity of the tank at various times has been recorded and is shown below. T (time in hours) 0 1 2.5 4 5 C (capacity in litres) 500 400 260 150 50 i. Use the graph paper on page 21 to plot the points. Make sure you label both axes. ii. Draw a line of best fit iii. What is the dependent variable