Sieun hits golf balls into the air, Each time she hits a ball she records 0, the angle at which the ball is launched into the air, and I, the horizontal distance, in metres, which the ball travels from the point of contact to the first time it lands. The diagram below represents this information 0 = 75 degrees = 60 degrees 0 = 45 degrees Sieun analyses her results and concludes: d/ de = -0.20 +9, 35

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