Verified answer

your x value didnt change so its a vertical (up and down) line with an undetermined (sometimes also called undefined) slpe

6. The slope is undetermined.

Slope = change in y over the change in x.

3--7 / 2-2

10 / 0 = vertical.

If "undetermined", by your definition also means undefined, then 6 is your answer.

Since the x values of the two coordinates are the same, we can determine that the line is vertical without having to write any equations.