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graph being calculated...This diagram shows how the optimum value of a quantity Q = ax+by can be found from a linear programming graph. First the constraints are plotted to create an unshaded region within which solutions must occur.

Graphs of Q=ax+by are plotted for various values of Q and can be used to help identify the values of x and y that give the required values of Q.
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This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA A-Level (UK - Pre-2017)D1Linear programmingLinear programming-
AQA AS Further Maths 2017Discrete MathsLinear ProgrammingLinear Programming-
AQA AS/A2 Further Maths 2017Discrete MathsLinear ProgrammingLinear Programming-
CBSE XII (India)Linear-ProgrammingLinear-ProgrammingTerminology: constraints, objective function, optimization-
Edexcel A-Level (UK - Pre-2017)D1Linear programmingLinear programming-
Edexcel AS Further Maths 2017Decision Maths 1Linear ProgrammingLinear Programming-
Edexcel AS/A2 Further Maths 2017Decision Maths 1Linear ProgrammingLinear Programming-
OCR A-Level (UK - Pre-2017)D1Linear programmingLinear programming-
OCR AS Further Maths 2017Discrete MathsGraphical Linear ProgrammingLinear Programming-
OCR MEI AS Further Maths 2017Modelling with AlgorithmsLinear ProgrammingLinear Programming-
OCR-MEI A-Level (UK - Pre-2017)D1Linear programmingLinear programming-
Universal (all site questions)LLinear programmingLinear programming-