Top answers

Do you need to quote other historians in exams?

In most A Level mark schemes, this is not a requirement. Examiners are looking for you to demonstrate your understanding of key historical concepts and ideas, show that you understand the significance of a q...
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Answered by Colm M. • History tutor
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What's the difference between a histogram and a bar chart?

A bar-chart is a graph where the height of the bar measures the frequency of a particular category which that bar represents. For a histogram, however, the height is the frequency density. This means that th...
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Answered by Colm M. • Maths tutor
12943 Views

What are "x" and "y" and why are they used?

The letters "x" and "y", or any other similar letter in an equation, are examples of unknown variables . What this means is that we don't know their value, and often the aim of the game i...
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Answered by Colm M. • Maths tutor
8577 Views

How do I find the distance between two point in the plane?

We can use Pythagoras' Theorem applied to co-ordinates of these points.
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Answered by Jonathon V. • Maths tutor
4794 Views

What is a derivative?

A derivative is a mathematical description of how one quantity will change with respect to another. For example the 1st derivative of some function will give you the gradient of the tangent at every point on...
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Answered by Jonathon V. • Maths tutor
5344 Views