o How should we define the two axes u In terms of the x-axis, what range is appropriate a How should the x-axis range be calibrated qd 0 0 750 10 15 450 300 300 400 25 500❑ How should we define the two axes ? ❑ In terms of the x-axis , what range is appropriate ? ❑ How should the x-axis range be calibrated ? p qd qs 0 900 0 5 750 100 10 600 200 15 450 300 20 300 400 25 150 500 30 0 600