The accompanying data represent the homework scores for material on Polynomial and Rational Functions for a random sample of students in a college algebra course. Complete parts (a) through (h). (a) Construct a relative frequency distribution with a lower class limit of the first class equal to 30 and a class width of 10. (Type integers or decimals. Do not round.) 囲 Cli Relative Frequency Class College algebra homework scores 38 67 77 83 91 47 68 79 84 91 54 72 79 85 92 58 74 79 86 93 62 76 79 86 94 65 76 79 87 95 67 77 82 88 95 67 77 83 89 98 OOOD OODD DDD DODO OOD || |

OHaganBooks.com has been promoting a number of books published by Duffin House. The following table shows the number of books purchased each month from Duffin House for the past 5 months. n(t) 2,000 4.2 - 0.7t n(t) = 300(1.6¹) n(t) = 100(4.1t² - 20.4t + 29.5) = n(t) n(t) Purchase (books) n(t) = Month t (a) Calculate the sum-of-squares error for each of the models. (Round your answers to one decimal place.) 3,000 n(t) 1 + 12(2-¹) n(t) Which of the models best approximates the data? 3,000 1 + 12(2-¹) = = = 1 2,000 4.2 - 0.7t n(t) = 300(1.6¹) n(t) = 100(4.1t² - 20.4t + 29.5) rising falling leveling off something else 2,000 4.2 0.7t 2 1,330 520 520 1,340 rising falling leveling off O something else 3 (b) What do each of the following models predict for the number of new users in the next few months: rising, falling, leveling off, or something else? 3,000 1 + 12(2-¹) 4 n(t) = 300(1.6¹) rising falling leveling off O something else n(t) = 100(4.1t² - 20.4t + 29.5) rising O falling O leveling…

In a test drive of a new fuel efficient car, a company tracks the car's mpg (miles per gallon) for 2 gallons of gasoline burned during a test drive. Use the approximating method developed in this section with intervals of 0.25 gallons of gasoline and the "left end" approach to complete the items below. Be sure to indicate the endpoints with open and closed "dots". (Click here for a printable version.)