This deep dive covers Special Cases and Variations within y = mx + c for GCSE Mathematics. Revise y = mx + c in Graphs for GCSE Mathematics with 10 exam-style questions and 20 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 9 of 9 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 9
Practice
10 questions
Recall
20 flashcards
Special Cases and Variations
| Equation Type | Form | Special Property |
|---|---|---|
| Through origin | y = mx | c = 0, passes through (0, 0) |
| Horizontal line | y = c | m = 0, parallel to x-axis |
| Steep positive | y = 5x + c | Large positive gradient |
| Gentle negative | y = -0.5x + c | Small negative gradient |
| 45° line | y = x + c | m = 1, rises 1 for every 1 across |