How can we compute slope and intercept for the least-squares line?.

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

It is 5.8 you add all of the up to equat 180 then solve the equation