11. The distance that a scuba diver can swim on one tank of compressed air and the speed at which she is swimming is shown in the graph. a) Use

the graph to estimate the range at a swim speed of 0.5 m/s(1 mark) b) What speed appears to be the maximum range?What is this range?(2 marks) )Is the rate of change with respect to speed increasing, constant or decreasing? Explain. Which of the following regression formulas would fit the above graph? Dy = 1200x + 300ii) y = -1000x² + 2000x - 100iii) y = -1200(0.2)2 Using the correct formula above, find out the range after 1.2 m/s.