Open Middle®
Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to find:
- the steepest slope
- the flattest slope
- the greatest y-intercept
- the least y-intercept
Hint
What does the coefficient of X or Y do to the slope?
Answer
Steepest: -9
Flattest: -1/9
Highest: 9
Lowest: 1/9
Flattest: -1/9
Highest: 9
Lowest: 1/9
Source: Dane Ehlert
