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Introduction: define what you interpret 'most important to mean'. In this case examples could be which factor had the biggest impact, which caused the most upset economically, socially an...

A 'strong' pound means that UK steel that is exported abroad becomes more expensive. This leads to a contraction of demand for UK steel in foreign markets and as a result sales will fall. Conversely, a 's...

We know that turning points occur when the gradient is equal to zero. Hence, we differentiate this curve. dy/dx = 2x+3 and we set this equal to zero. This gives 2x+3=0, we then rearrange to get 2x=-3 and ...

There are a few ways to do this, firstly you notice that there is no coefficient in front of the x^2. This means you can factorise it with relative ease, by finding numbers that add to give 5 but multiply...

One such method is Stellar parallax. When observing stars in the night sky, stars which are further away from Earth appear to 'move' less across the sky as the earth rotates. Using this, stellar parallax ...