Inverse proportion

Maths

Direct and indirect proportion

Fill in the gaps: Two quantities a and b are said to be directly proportional if one quantity is always a constant ........ of the other.

Fill in the gaps: Two quantities x and y are said to be inversely proportional if x increases as y ............... at the same rate, so their product is constant.

Fill in the gaps: Two variable quantities are said to be ........................ proportional if the product of the two quantities is constant.

Three builders take 15 days to complete a project. How many days does would it take one builder?

It takes 4 friends 6 hours to clean the garden. How long will it take 2?

1 bar of chocolate costs £2.10.  How much do 3 bars of chocolate cost?

Four tickets to the cinema cost £42. How much do 8 tickets cost?

Four tickets to the cinema cost £42. How much do 9 tickets cost?

Fill in the gaps: You can use .............. .............. to work out the best value for money.

x and y are directly proportional. What happens to y if x doubles?

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