Given the following Multiple linear regression [sales (in $1000) and price (in dollars)]: the below equation implies that an Sales = 5000 - 8 (Price) +7.25 (Advertising)

• Increase of $1 in advertisement is associated with an increase of $7250 in sales
• Increase of $1 in advertisement is associated with an decrease of $7. 25 in sales
• Increase of $7.5 in advertisement is associated with an increase of $1 in sales
• Increase of $1 in advertisement is associated with an increase of $7.25 in sales