A regression analysis between sales (y in $1000) and advertising (x in dollars) resulted in the following equation:
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= 30,000 + 5x
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The above equation implies that an
A. increase of $4 in advertising is associated with an increase of $5000 in sales.
B. increase of $1 in advertising is associated with an increase of $5 in sales.
C. increase of $1 in advertising is associated with an increase of $34,000 in sales.
D. increase of $1 in advertising is associated with an increase of $5000 in sales.
Answer: D
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