Math 133: 4.3 Worksheet #1 Name: Section #: 4.3: Least-Squares Regression 1. The following graph shows the relationship between contraceptive use and fertility rate all countries of the world for 2017. Notice the least-squares regression equation and correlation coefficient are given on the graph. (Source: https://www.prb.org/) Contraceptive Prevalence and Fertility Rates for Countries in 2017 y = -0.05x + 5.30 a r = -0.754 Fertility Rate (Birthsper Woman) W D 10 20 30 40 50 60 70 80 90 100 Contraceptive Prevalence Rate (Percentage of Married Women of Child-Bearing Age using Contraceptives) a) Find the coefficient of determination (Give 3 decimal places) b) The relationship between contraceptive use and fertility rate is (Circle one) trong Moderate Weak No Relation c) Interpret the coefficient of determination in the context of the situation