Aregression model is used to forecast sales based on advertising dollars spent. the regression line is y=500+35x and the coefficient of determination is .90. which is the best statement about this forecasting model? a. for every $35 spent on advertising, sales increase by $1.
b. even if no money is spent on advertising, the company realizes $35 of sales.
c. the correlation between sales and advertising is positive.
d. the coefficient of correlation between sales and advertising is 0.81.

The correlation between sales and advertising is positive.

Step-by-step explanation:

For every $35 spent on advertising, sales increase by $1

Is FALSE, since y = 500 + 35 x $35, sales increase more than $1

Even if no money is spent on advertising, the company realizes $35 of sales

Is FALSE, if no money is spent, the sales amount to $ 500 (when X = 0)

The coefficient of correlation between sales and advertising is 0.81

Is FALSE, since R² = 0.9. The coefficient of correlation = R = 0.94, not 0.81

1 Answer

tn= any term in the arithmetic sequence.

a= first term.

n= term number/number of terms.

d= common difference.

Step-by-step explanation:

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