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Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Which expression is not a polynomial?