IGCSEMathsEdexcelMaths A (Modular)Higher Unit 2FlashcardsNumberDirect & Inverse Proportion

Direct & Inverse Proportion (Edexcel IGCSE Maths A (Modular)) Flashcards

Exam code: 4XMAF/4XMAH

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  • FrontDirect Proportion

    What is direct proportion?

Cards in this collection (12)

  • What is direct proportion?

    Direct proportion means that as one variable goes up the other goes up by the same factor.

  • True or False?

    If x and y are directly proportional, then bold italic x bold colon bold italic y will always be the same.

    True.

    If x and y are directly proportional, then bold italic x bold colon bold italic y will always be the same.

  • What is k used to represent when working with direct proportion?

    When working with direct proportion, k is used to represent the constant of proportionality that connects x and y.

    y equals k x when x and y are directly proportional.

  • What does it mean for y to be directly proportional to the square of x?

    If y is directly proportional to the square of x, it means that y equals k x squared.

  • True or False?

    The graph of two directly proportional variables is a straight line.

    True.

    The graph of two directly proportional variables is a straight line.

    A graph with labelled x and y axes and a red line running diagonally from the bottom left to the top right, intersecting the y-axis at (0,0).

  • True or false?

    When solving a direct proportion problem, one of the first things you should do is find the value of the constant of proportionality k.

    True.

    When solving a direct proportion problem, one of the first things you should do is find the value of the constant of proportionality k.

  • What is inverse proportion?

    Inverse proportion means as one variable goes up the other goes down by the same factor.

  • What is k used to represent when working with inverse proportion?

    When working with inverse proportion, k is used to represent the constant of proportionality that connects x and y.

    y equals k over x when x and y are inversely proportional.

  • True or False?

    If x is inversely proportional to y, then bold italic x bold colon bold italic y will always be the same.

    False.

    If x is inversely proportional to y, then bold italic x bold colon bold 1 over bold italic y will always be the same.

  • How would you describe the relationship between Aand B if A equals k over B?

    If A equals k over B, it means that A is inversely proportional to B.

  • What is the equation for A in terms of B if A is inversely proportional to the square of B?

    If A is inversely proportional to the square of B, then A equals k over B squared.

  • True or False?

    The graph of two inversely proportional variables is a straight line.

    False.

    The graph of two inversely proportional variables is a not a straight line.

    Graph of y = k/x with asymptotes along the x and y axes.
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    1. Prime Factors, HCF & LCM

    2. Standard Form

    3. Using Percentages

    4. Compound Interest & Depreciation

    5. Ratio Toolkit

    6. Ratio Problem Solving

    7. Direct & Inverse Proportion

    1. Rearranging Formulas

    2. Algebraic Proof

    3. Solving Inequalities

    4. Simultaneous Equations

    5. Forming & Solving Equations

    6. Sequences

    1. Functions

    2. Graphing Inequalities

    3. Transformations of Graphs

    4. Differentiation & Gradients

    1. Angles in Polygons & Parallel Lines

    2. Bearings, Scale Drawing & Constructions

    3. Circle Theorems

    4. Volume & Surface Area

    5. Similarity & Geometrical Proof

    6. Area & Volume of Similar Shapes

    1. Vectors

    2. Transformations

    1. Statistics Toolkit

    2. Cumulative Frequency Diagrams