The grades on Political Science test and number of hours worked in the week before test were recorded. The scatterplot and regression line are shown here. Predicted Test = 86.55 - 0.4817 Work 100 90 Test Grade 80 70 60 0 10 20 30 40 Work Hours 1. Independent variable is (Type words as labelled in x and y axis) 2. Dependent variable is 3. Looking at the regression line, we can say that the correlation is (positive or negative). 4. Use sample data from scatter plot - Estimate the scores of 2 students who worked 20 hours? and 5. The equation of regression line is (Type equation as in image, no spaces) Predicted Test =