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NOTE 1: G LOSSARY flashcards

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  1. Card 1

    What are the three different representations of a mathematical relationship, as described in the source material?

    The three different representations of a mathematical relationship are algebraic representation (equation), pattern, and scenario. These three are interconnected and understanding how to transition between them is important.

  2. Card 2

    Explain the key difference between linear and quadratic relationships in terms of their rate of change and graphical representation.

    Linear relationships have a constant rate of change, meaning the numbers in a table increase by the same amount each time, and their graph forms a straight line. Quadratic relationships, however, have a changing rate, so the numbers in a table do not increase by a constant amount, and their graph forms a curve called a parabola.

  3. Card 3

    In the context of graphing relationships from a table, when should points be joined to form a continuous line, and when should they not be joined?

    In most cases, points should be joined to form a continuous line. However, if the context of the question implies that the values of x and/or y can only be whole numbers (discrete data), then the points should not be joined because it doesn't make sense to do so.

  4. Card 4

    If a linear equation is given in the form y = mx + c, what do 'm' and 'c' represent?

    In the linear equation y = mx + c, 'm' represents the gradient, which describes the slope or steepness of the line and its rate of change. 'c' represents the y-intercept, which is the point where the line crosses the y-axis.

  5. Card 5

    What are the steps to plot a linear graph using its gradient and y-intercept?

    To plot a linear graph using its gradient and y-intercept, first plot the y-intercept on the graph. From that point, use the gradient to 'rise' and 'run' to locate two more points. Finally, join the three points together, extending the line to fill the grid.

  6. Card 6

    Describe how a number in front of x^2 in a quadratic equation (i.e., 'a' in y = ax^2) affects the shape of the parabola.

    A number 'a' in front of x^2 stretches the parabola. If 'a' is greater than 1, the parabola stretches taller (becomes narrower). If 'a' is less than 1 (but greater than 0), it becomes flatter (wider).

  7. Card 7

    What is the meaning of 'gradient' in the context of linear graphs, and how is it related to the rate of change in real-life situations?

    The gradient describes how steep a line is, with a larger number indicating a steeper line. In real-life contexts, the gradient represents the rate of change for a situation, often expressed as 'per something,' such as a fee per person or a cost per kilometer.

  8. Card 8

    A telecommunications company offers three monthly plans for cell phone users. Plan A has a steep upward slope, Plan B is a horizontal line, and Plan C has a moderate upward slope starting above the origin. Which plan has a flat monthly charge regardless of calling time and how is this shown on the graph?

    Plan B has a flat monthly charge regardless of calling time. This is shown on the graph as a horizontal line, indicating that the cost (C) does not change with the number of calling minutes (x).

  9. Card 9

    Which of the following is NOT a representation of a mathematical relationship?

    • A. Equation
    • B. Pattern
    • C. Diagram (correct)
    • D. Scenario

  10. Card 10

    What is the term for the turning point of a parabola?

    • A. Origin
    • B. Intercept
    • C. Vertex (correct)
    • D. Gradient

  11. Card 11

    In the equation y = mx + c, if 'm' is 0, what type of line does the graph represent?

    • A. A vertical line
    • B. A horizontal line (correct)
    • C. A diagonal line with positive slope
    • D. A diagonal line with negative slope

  12. Card 12

    If a quadratic equation is in the form y = a(x - b)(x - c), what do 'b' and 'c' represent?

    • A. The y-intercepts
    • B. The coordinates of the vertex
    • C. The x-intercepts (correct)
    • D. The gradient and y-intercept

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