A chef is making a salad dressing by mixing vinegar (x x\,x ml) and olive oil (y y\,y ml) in the ratio 3:53:53:5.
Use this information to draw a graph showing the relationship between the amount of vinegar and the amount of olive oil used.
The chef decides to use 75 ml of olive oil. Use your graph to work out how much vinegar he should use.
60 exam-style questions on AQA GCSE Maths Writing a Ratio as a Fraction or Linear Function. Each one has a worked solution and a mark scheme showing where the marks go.