Which of the following statements is not​ true? a. The solution set to an inequality in two variables is the set of all ordered pairs that satisfy the inequality.
B. Given an inequality in the variables x and​ y, we can determine if the ordered pair​ (a, b) is a solution to the inequality by substituting the value of a in for x and b in for y. If a true statement results after this​ substitution, then​ (a, b) is a solution to the inequality.
C. Given an inequality in the variables x and​ y, we can determine if the ordered pair​ (a, b) is a solution to the inequality by substituting the value of a in for x and b in for y. If a false statement results after this​ substitution, then​ (a, b) is not a solution to the inequality.
D. It is not possible to sketch the graph of the solution to an inequality in two variables.