Almost every 0625 practical paper asks you to plot a graph, and the marks follow the same rules every time: labels, scale, plotting, the line, the gradient and a conclusion. This trainer gives you fresh readings each time, marks every step the way an examiner would, and shows you how to fix what you got wrong. Use Guided to learn with hints and animations, then Exam mode to test yourself without help.
The graph trainer needs JavaScript.
Each axis shows the quantity and its unit, written as quantity / unit, for example e / cm.
The points cover at least half the grid both across and up. Use steps of 1, 2, 2.5, 4 or 5 per large square (times a power of ten), never 3, 6, 7 or 9. The axes do not have to start at zero.
Every point is within half a small square of its true position. Use small neat crosses.
One thin straight line drawn with a ruler, with points balanced on both sides. Do not join dot to dot.
Use a large triangle, at least half the length of the line, and show the values you read and the calculation.
Direct proportion needs a straight line that passes through the origin. A straight line that misses the origin is not direct proportion.
The marking follows the conventions in published Cambridge mark schemes. The experiments, readings and wording on this page are our own.