54. Experimental data is represented in the standard (x, y) coordinate plane by a scatterplot consisting of 6 points: (1, 1.4), (2, 2.9), (3, 3.4), (4, 3.1), (5, 1.9), and (6, 0.2). When all possible real values for a, b, and c are considered, which of the following functions best fits the experimental data?

Answer and Explanation

Your Answer is

Correct Answer is K

Explanation

Observing the known data, it is found that with the increase of x, y first increases and then decreases, which should be a quadratic function with the opening downward. So K.