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The y = mx + c Formula Breakdown

Part of y = mx + c — GCSE Mathematics

This key facts covers The y = mx + c Formula Breakdown 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 2 of 9 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 9

Practice

10 questions

Recall

20 flashcards

The y = mx + c Formula Breakdown

  • y: The output value (dependent variable)
  • m: The gradient (slope) - how steep the line is
  • x: The input value (independent variable)
  • c: The y-intercept - where the line crosses the y-axis
  • +: Can be + or - depending on whether c is positive or negative

Keep building this topic

Read this section alongside the surrounding pages in y = mx + c. That gives you the full topic sequence instead of a single isolated revision point.

Building the Perfect EquationVisual Guide to y = mx + cKey Properties of y = mx + cConverting to y = mx + c Form

Practice Questions for y = mx + c

For the line y = 3x – 2, what is the gradient?

  • A. –2
  • B. 3
  • C. 2
  • D. –3
1 markfoundation

Two students write down equations for parallel lines: Student A writes: y = 2x + 1 Student B writes: y = 2x + 1 Explain why these two lines are NOT parallel to each other.

2 markshigher

Quick Recall Flashcards

What gradient gives a 45° line?
m = 1 (rises 1 unit for every 1 unit across)
What is special about y = mx?
It passes through the origin (0, 0) because c = 0.

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