A Horticulturist Conducted an Experiment to Determine the Effects of Different

Multiple Choice

A horticulturist conducted an experiment to determine the effects of different amounts of fertilizer on the yield of a plot of green onions.He modeled his results with the function $Y(x) =-0.5(x-2) ^{2}+5$
where Y is the yield in bushels and x is the amount of fertilizer in pounds.What are $Y(0.75)$
and $Y^{\prime}(0.75)$
? Give your answers to two decimal places, specify units.

A) 4.22 bushels, 1.25 bushels/pound, respectively
B) 4.22 bushels, 6.25 bushels/pound, respectively
C) 1.25 bushels, 1.56 bushels/pound, respectively
D) 1.25 bushels, 4.22 bushels/pound, respectively