Regression analysis was applied between sales (y in $1,000s) and advertising (x in $100s) and the following estimated regression equation was obtained. ŷ = 80 + 6.3x Based on the above estimated regression line, if advertising is $10,000, find the point estimate for sales (in dollars).   a. $710 b. $63,080    c. $143,000 d. $710,000

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