Integer Y-Intercepts

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.


What is the x-coordinate of a y-intercept? What will the equation look like when it is written in slope-intercept form?


One possible answer is:
8x+2y = 4
5x+3y = 6
9x+1y = 7

Source: Michelle Kovesi and Harold Jacobs

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