Determine whether each ordered pair is a solution of the equation, y = 3x + 21. (0,21), (-7,0), (3,-23) Determine if (0,21) is a solution of the equation, y = 3x + 21. A. (0,21) is a solution because y does equal 21 when x equals 0. OB. (0,21) is not a solution because y does not equal 21 when x equals 0. OC. (0,21) is a solution because x does equal 21 when y equals 0. OD. (0,21) is not a solution because x does not equal 21 when y equals 0. Determine if (-7,0) is a solution of the equation, y = 3x + 21. OA. (-7,0) is not a solution because y does not equal - 7 when x equals 0. OB. (-7,0) is not a solution because x does not equal - 7 when y equals 0. OC. (-7,0) is a solution because y does equal 0 when x equals - 7. OD. (-7,0) is a solution because x does equal 0 when y equals - 7.