Open Middle®
Directions: Using the integers −9 to 9 at most one time each, place an integer in each box to create a system of inequalities as well as an included and excluded point.
Hint
How can you check whether your solution is included or excluded algebraically? How can you check whether your solution is included or excluded graphically?
Answer
There are many possible answers including:
y < -1x + 3
y > 4x + -2
Included: (-5, 1)
Excluded: (9, 0)
y < -1x + 3
y > 4x + -2
Included: (-5, 1)
Excluded: (9, 0)
Source: Robert Kaplinsky
