The x-axis represents elevation (meters), and the y-axis represents the measure of plant diversity.
The quadratic function graphed above models a particular measure of plant diversity as a function of the elevation in a region of Switzerland. The vertex of the parabola shown represents a key characteristic of plant diversity in relation to elevation. Which of the following statements best describes what the coordinates of the vertex (approximately 1,250, 13,500) signify in this context?
The highest elevation surveyed and the corresponding plant diversity.
The elevation at which plant diversity is lowest, and that lowest diversity measure.
The elevation at which plant diversity is greatest, and that greatest diversity measure.
The average elevation and average plant diversity.
