At a large state university, the Statistics department is interested in tracking the progress of its students from entry until graduation. In this example: X represents a student's final numeric grade (out of 100) in an introductory statistics course Y represents a student's final numeric grade (out of 100) in an upper-level statistics coursse The least-squares regression equation for this relationship is: Y = 5.70 + 0.89X What is the slope of the regression line? Provide a numeric value as shown in the equation