points Points: 0.25 of 1 Save K An individual's income varies with age. The table Class shows the median income I of individuals of Age Midpoint, different age groups within the United States for Median X Income, I a certain year. For each age group, let the class midpoint represent the independent variable x. 15-24 years 19 5 $10,964 For the class "65 years and older," assume that 25-34 years 29.5 $31,130 the class midpoint is 69 5 35-44 years 39 5 $41,636 45-54 years 49.5 $44,692 Complete parts (a) through (e) 55-64 years 59 5 $42,478 65 years and older 69 5 $24,502 . . . c. Quadratic with a 0 (b) Use a graphing utility to find the quadratic function of best fit that models the relation between age and median income The quadratic function of best fit is y = -43.141 x2 + 4138.955 x - 53603.594 (Type integers or decimals rounded to three decimal places as needed.) (c) Use the function found in part (b) to determine the age at which an individual can expect to earn the most income At about years of age, the individual can expect to earn the most income (Do not round until the final answer. Then round to the nearest tenth as needed.) X (1,") MoreBrowser erHomework.aspx?homeworkld=649025847&questionld=5&flushed=false&cld=7389298¢e ummer 2023 Kaeline cauley 06/21/23 7: Question 3, 4.4.7 HW Score: 71.5%, 3.58 of 5 4.4 Part 1 of 3 points Points: 0.2 of 1 Diana has 440 yards of fencing and wishes to enclose a rectangular area. (a) Express the area A of the rectangle as a function of the width W of the rectangle. (b) For what value of W is the area largest? (c) What is the maximum area