Use the horizontal number line shown to answer the question. Which statements are true? Check all that apply. a.–9 < –7 b.–6 = 6 c.–1 > –3d. 0 < –3

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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.

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

answer: the slope is equal -1.