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Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

• Direct and Inverse Proportion A self-marking exercise in solving direct and inverse variation problems.

Here are some exam-style questions on this statement:

• "The following table shows corresponding values for two variables \(x\) and \(y\). " ... more
• "(a) Sketch a graph on the axes below left that shows that \(y\) is directly proportional to \(x\)." ... more
• "At a constant temperature, the volume of a gas \(V\) is inversely proportional to its pressure \(p\). By what percentage will the pressure of a gas change if its volume increases by 15% ?" ... more
• "Which of the following statements are correct if \(xy = c\) and \(c\) is a constant." ... more
• "If \(a\) is inversely proportional to \(b\) and \(b\) is directly proportional to \(c^2\) find a formula for \(a\) in terms of \(c\) given that \( a=20 \) and \(c = 4 \) when \(b = 8 \). " ... more

See all these questions

Click on a topic below for suggested lesson Starters, resources and activities from Transum.

• Ratio A ratio is a relationship between two numbers of the same kind. In layman's terms a ratio represents, simply, for every amount of one thing, how much there is of another thing. This topic presents a number if different ways pupils can represent ratios and apply their meaning to problem solving situations.