Explore how conversion graphs are used to change one unit into another with BBC Bitesize Maths. ... Drawing a straight line through it from the origin, creates the graph. The origin is 0, ...

Read, interpret graphs and use this information to understand the data. ... Two quantities that are in direct proportion will always produce a straight-line graph that passes through the origin.

In the 60 years after World War II, the United States built the world's greatest middle class economy, then unbuilt it. And if you want a single snapshot that captures the broad sweep of that ...