Direct Variation What is direct variation? The graphs of these models always start at the origin How do I solve direct variation problems? Worked Example b)Find the time it takes to order a list of...
Exponential Models What are the parameters of an exponential model? An exponential model is of the form Where e is the mathematical constant 2.718… The c represents the boundary for the function It...
Edexcel IGCSE Physics 复习笔记 2.2.3 Resistors in Series Resistors in Series When two or more resistors are connected in series, the total (or combined) resistance is equal to the sum of the...
Quadratic Models What are the parameters of a quadratic model? This is given in the formula booklet as the axis of symmetry What can be modelled as a quadratic model? These can be used if the graph...
Edexcel IGCSE Physics 复习笔记 2.2.2 Voltage in Series & Parallel Voltage in Series & Parallel In a series circuit: The current is the same at all points ie. through each component T...
Linear Models What are the parameters of a linear model? The m represents the rate of change of the function This is the amount the function increases/decreases when x increases by 1 If the functio...
Quadratic Functions & Graphs What are the key features of quadratic graphs? If a is positive then the vertex is the minimum point If a is negative then the vertex is the maximum point Exam Tip ...
Graphing Functions How do I graph the function y = f(x)? What is the difference between “draw” and “sketch”? If asked to sketch you should: Show the general shape Label any key points such as the i...
Language of Functions What is a mapping? A mapping transforms one set of values (inputs) into another set of values (outputs) Mappings can be: One-to-one Each input gets mapped to exactly one uniqu...
