| A | B |
|---|
| Coinciding lines | Two lines with all points shared |
| Intersection | A point at which two lines cross |
| Infinite | An uncountable number of solutions |
| Null set | There are no solutions |
| Parallel lines | Two lines with the same slope that never intersect |
| Perpendicular lines | Two lines that intersect to form right angles |
| Vertical line | An up and down line |
| Horizontal line | A left and right line |
| X-intercept | Where a line crosses the x-axis |
| Y-intercept | Where a line crosses the y-axis |
| Slope | Numerical value that tells how steep a line is - also rise over run |
| Relation | Any set of ordered pairs |
| Perpendicular lines | Two lines that intersect to form right angles |
