Open Middle®
Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to create three different linear equations whose y-intercepts have integer values.
Hint
What is the x-coordinate of a y-intercept? What will the equation look like when it is written in slope-intercept form?
Answer
One possible answer is:
8x+2y = 4
5x+3y = 6
9x+1y = 7
8x+2y = 4
5x+3y = 6
9x+1y = 7
Source: Michelle Kovesi and Harold Jacobs
