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The x-intercept is where your line first touches the x-axis. The y-intercept is the same thing but is when the line touches the y-axis. The total amount of money would go in the box that says y-intercept. The number of cups of lemonade that must be sold to break even would go in the x-intercept box. By break even they mean to get out of debt. 

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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.