Question 15 2 pts Which of the following approaches for estimating fixed and variable costs using historical information fits a straight line to a set of data points? Scattergraph method and regression analysis Scattergraph method and account analysis High-low method and account analysis Scattergraph method and high-low method None of the answer choices is correct. Question 16 2 pts All of the following are steps of the high-low method except: stating the results in equation form Y=f+ vX. calculating the fixed cost per unit. calculating the variable cost per unit. identifying the high and low activity data points. None of the answer choices is correct