$$ \hat{y}=101.32+2.48 x \text { where } \hat{y} \text { is in thousands of dollars. } $$ What would you predict the sales to be on day 90 ?

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UpStudy AI · Accepted Answer

Given the regression equation:
$$
\hat{y} = 101.32 + 2.48x,
$$
where $$\hat{y}$$ is in thousands of dollars, we want to predict sales on day $$x = 90$$.

1. Substitute $$x = 90$$ into the equation:
   $$
   \hat{y} = 101.32 + 2.48(90).
   $$

2. Calculate the product $$2.48 \times 90$$:
   $$
   2.48 \times 90 = 223.2.
   $$

3. Add the result to the intercept:
   $$
   \hat{y} = 101.32 + 223.2 = 324.52.
   $$

Thus, the predicted sales on day 90 is $$\hat{y} = 324.52$$ thousand dollars.
The predicted sales on day 90 are 324.52 thousand dollars.

What would you predict the sales to be on day 90 ?

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