What is the equation of a line that passes through the point (2,1) and has an undefined slope?

What is the equation of a line that passes through the point (2,1) and

1.	What is the equation of a line that passes through the point (2,1) and has an undefined slope?
Answer» <strong style="font-size: 15px; line-height: 20px !important;">What is the equation of a line that passes through the point (2,1) and has an undefined slope?</strong><p><strong>Solution:</strong></p>