By selling an article, Sonu makes a profit of 20% . If the CP decreases by 10% and SP also increases by 10% , calculate her profit percentage

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.