Go to content
Check you understand how substitution works in algebra.

 Click the left mouse button in the regions below to substitute the above functions. You may need to click more than once. Click with the right button to start again.

HotEqn is a Java applet to view and display mathematical equations on the Web. The applet uses the familiar LaTeX notation to code its equations. Fontsizes are variable, so the applet can be used to display inline equations as well.

## Glossary

### variable

A value which is unknown and free to vary, often denoted by x or y.

Full Glossary List

## This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AP Calculus AB (USA)2Algebra and FunctionsFunctions-
AP Calculus BC (USA)2Algebra and FunctionsFunctions-
AQA A-Level (UK - Pre-2017)C3Algebra and FunctionsFunctions-
CCEA A-Level (NI)C4Algebra and FunctionsFunctions-
Edexcel A-Level (UK - Pre-2017)C3Algebra and FunctionsFunctions-
I.B. Higher Level2Algebra and FunctionsFunctions-
I.B. (MSSL)4Algebra and FunctionsFunctions-
I.B. Standard Level2Algebra and FunctionsFunctions-
OCR A-Level (UK - Pre-2017)C3Algebra and FunctionsFunctions-
OCR-MEI A-Level (UK - Pre-2017)C3Algebra and FunctionsFunctions-
Scottish HighersM1Algebra and FunctionsFunctions-
WJEC A-Level (Wales)C3Algebra and FunctionsFunctions-
CIE A-Level (UK)P1Algebra and FunctionsFunctions-
Methods (UK)M2Algebra and FunctionsFunctions-
Pre-U A-Level (UK)1Algebra and FunctionsFunctions-
Scottish Advanced HighersM1Algebra and FunctionsFunctions-
Scottish (Highers + Advanced)HM1Algebra and FunctionsFunctions-
Universal (all site questions)AAlgebra and FunctionsFunctions-
CBSE XI (India)Sets and FunctionsRelations & FunctionsElementary functions: exp, log sign, polynomial, rational-
CBSE XII (India)Relations and FunctionsRelations & FunctionsTypes of relations, reflexive, symmetric, transitive and equivalence-
Edexcel A2 Maths 2017Pure MathsFunctions and GraphsFunctions and Mappings-
AQA A2 Maths 2017Pure MathsFunctions and TransformationsFunctions and Mappings-
OCR A2 Maths 2017Pure MathsFunctions and TransformationsFunctions and Mappings-
OCR MEI A2 Maths 2017Pure MathsFunctions and TransformationsFunctions and Mappings-
Edexcel AS/A2 Maths 2017Pure MathsFunctions and GraphsFunctions and Mappings-
AQA AS/A2 Maths 2017Pure MathsFunctions and TransformationsFunctions and Mappings-