On a coordinate grid, point t is at (2, −4) and point s is at (2, 6). the distance (in units) between points t and s is (input only whole numbers, such as 2.)

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.