linear regression.

Could you help me with this question please,

5. A member of a student team playing an interactive marketing game received the following computer output when studying the relation between advertising expenditures (X ) and sales (Y) for one of the team's products: Estimated regression equation: Y = 350.7 - 0.18X. Two-sided P-value for the estimated slope is 0.91. The student stated: "The message I get here is that the more we spend on advertising this product, the fewer units we sell!" Comment