Exam Maths Puzzle Co-ordinate geometry

1. let f be a quadratic function with a minimum value of -22100, a line of symmetry of x = 140, and a y-intercept of (0,-2500).
2. the function g is the same as f but reflected about the x-axis and reduced by a factor of 200.
3. if x equals your grade
What is the value of g to one decimal place?

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Thanks