Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to create two perpendicular lines.
![](https://www.openmiddle.com/wp-content/uploads/2021/05/perpendicularlins.png)
Hint
How can you algebraically verify that your lines are perpendicular? How can you graphically verify that your lines are perpendicular?
Answer
There are many possible answers including:
y = 2/3x + 5
6x + 4y = 8
y = 2/3x + 5
6x + 4y = 8
Source: Robert Kaplinsky