Gradients and prime numbers

Which of these lines shows a negative gradient?

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• 
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Which of these lines shows a positive gradient?

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• 
• 

Which of these lines shows a gradient of zero?

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• 

That do you call this shape?

• rectangle

• square

• triangle

• circle

The gradient of a line m is ...

• positive

• negative

The gradient of a line m is positive.

How can you justify this?

• The line goes from the top left to the bottom right.

• The line goes from the bottom left to the top right.

Calculate the gradient of this line

• 4 / 7 = 0.57

• 4 / 8 = 0.5

What comes once in a minute, twice in a moment, but never in a thousand years?

The gradient of a line is ...

• positive

• negative

The gradient of a line m is positive.

How can you justify this?

• The line goes from the top left to the bottom right.

• The line goes from the bottom left to the top right.