Lesson 2: Graphs, Best-Fit Lines and Gradients | CSEC Physics

Graphs win marks in every CSEC Physics paper. Learn how to choose scales, plot points, draw a proper line of best fit and calculate a gradient with units, the way examiners want to see it. By the end of this lesson you should be able to: Use graphs of experimental data from simple pendulum (A1.3) Draw a line of best fit for a set of plotted values (A1.4) Determine the gradient of the straight line graph (A1.5) In this lesson: Animated, step-by-step explanations of every key idea Worked examples, solved line by line Real-world applications and the SBA practical for this topic The most common exam mistakes and how to avoid them Memory tips and tricks CSEC-style exam questions (Paper 01 multiple choice and Paper 02 structured) with model answers. Pause the video when you see "Pause & try!" Analogies used: The best-fit line is a tug of war; A gradient is the steepness of a road. Chapters: 0:00 Introduction and learning objectives 0:35 Drawing a good graph 1:37 The line of best fit 3:20 The gradient 7:11 Worked examples 9:35 Common mistakes 10:16 Exam practice This is lesson 2 of 44 in a complete video course on the CXC CSEC Physics syllabus (Section A: Mechanics). Previous lesson: Lesson 1: Galileo, the Scientific Method and the Simple Pendulum Next lesson: Lesson 3: Measurement, Errors and Significant Figures #CSECPhysics #CXC #Physics