Eduardo has started playing golf. In golf, the lower the score, the better. To try to reduce his score, he has lessons with a professional. He keeps a record of his progress. a Plot these points on a graph of H against W. Draw in the best straight line. b What was Eduardo's score before he started lessons? c Find the gradient and y-intercept of the line and write down the equation of the line in the form ax + by = c. d To enter a trial for the team, Eduardo needs to have a score below 12. Use your equation to find how many weeks it will take Eduardo to reduce his score to 12. Do you think this is a reasonable value? Give a reason for your answer.