Are these two mistakes related? What’s the fastest way to help this student?

Why is this mistake attractive to the student? How could you make it unattractive?

Thanks to Tina Cardone for the submission.

The submitter of this mistake reports that the student is a “high flyer.”

- What is this student’s confusion?
- Why made this mistake so tempting? After all, if a student just doesn’t understand “slope” there are a million things that they could do wrong. Why this one?

Thanks to Jeff de Varona for the submission. Go check out his blog and follow him on twitter.