If using the method of completing the square to solve the quadratic equation x2 + 20x + 28 = 0, which number would have to be

added to "complete the square"?

Mr. jones determined that the equation y = 98 - 16/5 x could be used to predict his students' unit test scores, based on the number of days, x, a student was absent during the unit. what was the meaning of the y-intercept of the function? (by the way the 16/5 is a )