A farmer performs an experiment to find the amount of fertilizer needed to increase crop yields. She uses different amounts of fertilizer, measured in pounds per acre (Ib/acre). She then records the yields, in bushels per acre (bu/acre).
Her results are shown in the table and graphed on the scatter plot.

Which equation best models the farmer’s data?

•A, y = 0.37x + 31
•B, y = 32(1.006)^x
•C, y = -0.009x^2 + 2.13x - 43
•D, y = -0.009x^2 + 2.13x + 43