| Area Tested | Pre-Knowledge Observed gaps | Pre-Knowledge | Post-knowledge | Marginal Changes | |||
| Frequency | % | Frequency | % | Frequency | % | ||
| Drawing coordinate plane | Failure to show the arrows in the plane and express the meaning of arrows in x and y lines | 20 | 33% | 52 | 87% | 32 | 53% |
| Determine the x-axis | Inappropriate, exchange naming and leave lines without naming | 20 | 33% | 51 | 85% | 31 | 52% |
| Determine the y-axis | 18 | 30% | 48 | 80% | 30 | 50% | |
| Determine point of origin | Leave the plane blank, not able to plot the place presenting origin points | 32 | 53% | 53 | 88% | 21 | 35% |
| Identify the Quadrants | The terminology seems not clear, failure to identify, not able to allocate properly, leave the plain blank | 16 | 27% | 57 | 95% | 41 | 68% |
| Identify the Points in each quadrant | Wrongly allocating vertical and horizontal integers from the origin, difficulties in identification of points, mixture in presenting points (x, y) instead (y, x) or (x, x) and (y, y) | 12 | 20% | 51 | 85% | 39 | 65% |
| Determine x-intercept in relation to y-axis | Puzzled in linking where is 0 for y in x intercept | 8 | 13% | 42 | 70% | 34 | 57% |
| Determine y-intercept in relation to x-axis | Puzzled in linking where is 0 for x in y intercept | 4 | 7% | 47 | 78% | 43 | 72% |