New SAT Math Workbook

Example if you randomly select one letter from each

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Unformatted text preview: r is (D). You’re task here is to compare the size of the entertainment portion of the left-hand bar to the combined sizes of the same portion of the other to bars. Size up the ratio visually. The portion on the first chart is a bit larger than the other two combined, and so you’re looking for a ratio that’s greater than 1:1. Approximate the height of each three portions: 13–18 age group: 25 hours 19–24 age group: 5 hours 25–30 age group: 10 hours The ratio in question is 25:15, or 5:3. Additional Geometry Topics, Data Analysis, and Probability 295 Example (Scatter Plot): Companies A, B, C, D, and E all manufacturer and sell a similar product. The graph above compares manufacturing costs and sales prices per unit among the five companies. If all five companies have sold the same number of units, which company has earned the greatest profit from those sales? (A) A (B) B (C) C (D) D (E) E Solution: The correct answer is (E). Since the number of units sold was the same for all five companies, the greatest profit was earned by the company with the highest price-to-cost ratio. You can compare ratios by drawing a line segment from point 0 to each of the five plotted points. The segment with the steepest slope (vertical change divided by horizontal change) indicates the greatest price-to-cost ratio. Segment OE has the steepest slope, and hence company E earned the greatest profit. 296 Chapter 16 Exercise 5 Work out each problem. Circle the letter that appears before your answer. 1. According to the data shown below, by approximately what amount did Division D’s income exceed Division C’s income during year X? WEBCO’S INCOME DURING YEAR X — DIVISIONS A, B, C, AND D 3. Referring to the graph below, during the twomonth period over which the average daily temperature in City X increased by the greatest percentage, City Y’s highest daily temperature was approximately: (A) (B) (C) (D) (E) 2. $125,000 $127,000 $140,000 $156,000 $312,000 Among the years covered in the graph below, during the year in which aggregate awards of non-minority and minority funds was gr...
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