S1

Tie for Two:
A and B have a positive slope
A and D have a positive y-intercept
B and C a negative y-intercept
B and C intersect the y-axis at (0, -3).

Thread for Three:
A, B, and D go through 3 different quadrants
A, C, and D have a positive x-intercept
A, B, and D are linear

Fit for Four:
All graphs are continuous
All graphs use two variables
All graphs go through the same point (3, 4)