correctAnswer not working?

var questions = [
['How many states in the U.S.?', 50],
['What\'s the name of your cat?', 'Caesar'],
['What is your name?', 'Nate']
];

var corectAnswer = 0;
var question;
var answer;
var response;
var html;




function print(message) {
  document.write(message);
}

 function Quiz (list) {
while (true) {

for (var i = 0; i < list.length; i += 1 ) {
response = prompt(list[i][0]);
  answer = list[i][1];
  response = response.toLowerCase();
}

   if (response = 'quit') {
   break;
   }
    else if (response === answer) {
    correctAnswer += 1;
    } 
}
   print('You got ' + corectAnswer + ' questions right');

 }

Quiz(questions);