Revision NotesExam QuestionsFlashcardsPast Papers
IGCSEMathsEdexcelMaths AHigherFlashcardsNumbers & the Number SystemDirect & Inverse Proportion

Direct & Inverse Proportion (Edexcel IGCSE Maths A)

Flashcards

1/12

0Still learning

Know0

  • FrontDirect Proportion

    What is direct proportion?

Enjoying Flashcards?
Tell us what you think

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.
Previous:Exchange Rates & Best BuysNext:Algebra Toolkit

    1. Topic 1

      Number Toolkit

    2. Topic 2

      Set Notation & Venn Diagrams

    3. Topic 3

      Prime Factors, HCF & LCM

    4. Topic 4

      Powers, Roots & Standard Form

    5. Topic 5

      Fractions

    6. Topic 6

      Percentages

    7. Topic 7

      Compound Interest & Depreciation

    8. Topic 8

      Fractions, Decimals & Percentages

    9. Topic 9

      Rounding, Estimation & Bounds

    10. Topic 10

      Surds

    11. Topic 11

      Using a Calculator

    12. Topic 12

      Ratio Toolkit

    13. Topic 13

      Ratio Problem Solving

    14. Topic 14

      Exchange Rates & Best Buys

    15. Topic 15

      Direct & Inverse Proportion

    1. Topic 1

      Algebra Toolkit

    2. Topic 2

      Algebraic Roots & Indices

    3. Topic 3

      Expanding Brackets

    4. Topic 4

      Factorising

    5. Topic 5

      Completing the Square

    6. Topic 6

      Algebraic Fractions

    7. Topic 7

      Rearranging Formulas

    8. Topic 8

      Algebraic Proof

    9. Topic 9

      Solving Linear Equations

    10. Topic 10

      Solving Quadratic Equations

    11. Topic 11

      Solving Inequalities

    12. Topic 12

      Simultaneous Equations

    13. Topic 13

      Forming & Solving Equations

    1. Topic 1

      Sequences

    2. Topic 2

      Functions

    3. Topic 3

      Coordinate Geometry

    4. Topic 4

      Linear Graphs y = mx + c

    5. Topic 5

      Graphs of Functions

    6. Topic 6

      Estimating Gradients

    7. Topic 7

      Real-Life Graphs

    8. Topic 8

      Graphing Inequalities

    9. Topic 9

      Transformations of Graphs

    10. Topic 10

      Differentiation

    1. Topic 1

      Standard & Compound Units

    2. Topic 2

      Angles in Polygons & Parallel Lines

    3. Topic 3

      Bearings, Scale Drawing & Constructions

    4. Topic 4

      Circle Theorems

    5. Topic 5

      Area & Perimeter

    6. Topic 6

      Circles, Arcs & Sectors

    7. Topic 7

      Volume & Surface Area

    8. Topic 8

      Congruence, Similarity & Geometrical Proof

    9. Topic 9

      Area & Volume of Similar Shapes

    10. Topic 10

      Right-Angled Triangles - Pythagoras & Trigonometry

    11. Topic 11

      Sine, Cosine Rule & Area of Triangles

    12. Topic 12

      3D Pythagoras & Trigonometry

    1. Topic 1

      Vectors

    2. Topic 2

      Transformations

    1. Topic 1

      Statistics Toolkit

    2. Topic 2

      Histograms

    3. Topic 3

      Cumulative Frequency Diagrams

    4. Topic 4

      Probability Toolkit

    5. Topic 5

      Probability Diagrams - Venn & Tree Diagrams

    6. Topic 6

      Combined & Conditional Probability