Almost all of the acidity of soda pop comes from the phosphoric acid which is ad

Question

Almost all of the acidity of soda pop comes from the phosphoric acid which is added to give them a sharper flavor. Is there an association between the pH of the soda and the amount of phosphoric acid (in grams)? The correlation between pH and phosphoric acid is -0.991. Describe the association.

Weak linear relation in a negative direction

Very strong linear relation in a negative direction

Weak linear relation in a positive direction

No evidence of relation

Strong linear relation in a positive direction

Weak linear relation in a negative direction

Very strong linear relation in a negative direction

Weak linear relation in a positive direction

No evidence of relation

Strong linear relation in a positive direction

Explanation / Answer

As r = -0.991, then notice:

1. It has absolute value close to 1 [strong linear relation]

2. Its sign is negative.

Hence,

OPTION B: Very strong linear relation in a negative direction [ANSWER, B]

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