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GF.16.9

Find the equation of a line

Find the equation of any straight-line graph (and use y=mx+c)

2 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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Grade 3–5 Core 🇬🇧 UK

GCSE Maths - How to Find the Equation of a Straight Line (y = mx + c) (2026/27 exams)

Cognito 824K views

Read off c and calculate m straight from a graph to write y=mx+c.

Jump to 0:14The Equation y = mx + c Explained 0:42Example 1: Finding the Equation 0:52Example 1: Identifying the Y-intercept (c)1:02Example 1: Calculating the Gradient (m)2:18Example 1: Forming the Final Equation 2:37Example 2: Finding the Equation

Grade 3–6 Core 🇬🇧 UK

Equation of a Line - GCSE Maths

1st Class Maths 241K views

Thorough walkthrough of finding a line's equation from graphs, two points and context.

Jump to 0:10Working out the gradient of a line 4:17Finding the y-intercept 6:07Finding the equation of a line 9:43Contextual examples 16:20Is a point on a particular line or not?17:41Equation of a line through 2 points