Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: A {Perpendicular; y-intercept; Straight; Vertical; Parallel; Horizontal; Situational; Slope; Undefined; Diagonal} line has an undefined slope. A {Vertical; Parallel; Slope; Situational; Undefined; Diagonal; Perpendicular; y-intercept; Horizontal; Straight} line has a slope of [m equals 0]. {Vertical; Parallel; Perpendicular; Horizontal; Diagonal; Situational; Undefined; Slope; y-intercept; Straight} lines have the same slope. {y-intercept; Parallel; Undefined; Vertical; Perpendicular; Situational; Horizontal; Straight; Slope; Diagonal} lines have slopes that are opposite reciprocals.
Right answer summary: part 1: Vertical; part 2: Horizontal; part 3: Parallel; part 4: Perpendicular
Question state: todo