Knowing how to read your camera's histogram is the most important thing you can do to ensure a good exposure. ... the graph will look bunched up at the right, suggesting burnt-out highlights.

Revise how to plot a linear equation graph. Learn how to read x and y coordinates from a graph in this BBC Bitesize maths KS3 guide.

Learn how to draw and understand information presented by a line graph with this interactive guide by BBC Bitesize for KS2 pupils. ... Once you know what the graph is about, you can read the data.