The Protease Activity Found in Walnuts Preserved in Buffers of Various

Multiple Choice

The protease activity found in walnuts preserved in buffers of various pHs is listed in the following table:
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$$\begin{array} { | l | l | l | l | l | l | l | l | } \hline \text { pH } & 4.5 & 5 & 6 & 7 & 8 & 9 & 10 \\\hline \text { protease activity } & 0.17 & 0.245 & 0.28 & 0.055 & 0.02 & 0 & 0.025 \\\hline\end{array}$$ What can we conclude about the relationship between walnut protease activity and pH?

A) There is a positive linear association between walnut protease activity and pH.
B) There is a negative linear association between walnut protease activity and pH.
C) The association between walnut protease activity and pH is nonlinear.
D) Walnut protease activity is not affected at all by pH.