Answer:
 B. y = -0.58x^2 -0.43x +15.75
Step-by-step explanation:
The data has a shape roughly that of a parabola opening downward. So, you'll be looking for a 2nd-degree equation with a negative coefficient of x^2. There is only one of those, and its y-intercept (15.75) is in about the right place.
 The second choice is appropriate.
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The other choices are ...
 A. a parabola opening upward
 C. an exponential function decaying toward zero on the right and tending toward infinity on the left
 D. a line with negative slope (This might be a good linear regression model, but the 2nd-degree model is a better fit.)