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Graphs of functions

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  • the value that comes out of a function
    output
  • a graph that forms a straight line
    linear graph
  • a symbol, usually a letter, that stands for a number
    variable
  • two numbers written in brackets to show a point, such as (2,3)
    ordered pair
  • the value you choose or change, usually shown on the x-axis
    independent variable
  • the flat surface formed by the x-axis and y-axis
    coordinate plane
  • an exact position marked on a graph
    point
  • a group of numbers, symbols, or variables showing a value
    expression
  • the horizontal line on a graph
    x-axis
  • the connection between two sets of values
    relationship
  • to go down in value
    decrease
  • the set of possible input values
    domain
  • a rule that matches each input with exactly one output
    function
  • a graph that uses points joined by lines to show change
    line graph
  • a way of showing how inputs are connected to outputs
    mapping
  • the value that changes because of the independent variable, usually shown on the y-axis
    dependent variable
  • the direction of decreasing numbers on an axis
    negative direction
  • the equal spaces between numbers on a scale
    interval
  • a repeated or predictable way numbers change
    pattern
  • a guide that explains symbols, colours, or markings on a graph
    key
  • data that can take any value within a range
    continuous data
  • to go up in value
    increase
  • a sign used in maths, such as +, −, ×, ÷, or =
    symbol
  • a number sentence showing that two expressions are equal
    equation
  • the point where a graph crosses an axis
    intercept
  • the direction of increasing numbers on an axis
    positive direction
  • the numbers or intervals used on the axes of a graph
    scale
  • the set of possible output values
    range
  • a word or phrase used to identify an axis or part of a graph
    label
  • the value that goes into a function
    input
  • a bent line on a graph showing a changing relationship
    curve
  • a smooth line drawn to show the general pattern of data
    curve of best fit
  • a chart showing inputs and their matching outputs
    table of values
  • a graph that uses bars to compare amounts
    bar graph
  • a value that does not change
    constant
  • one of the four sections of a coordinate plane
    quadrant
  • the heading that tells what the graph is about
    title
  • going across from left to right
    horizontal
  • a diagram used to show information or relationships
    graph
  • the opposite operation used to work backwards in a function
    inverse operation
  • going up and down
    vertical
  • to place a point on a graph
    plot
  • the pattern or operation used in a function
    rule
  • the vertical line on a graph
    y-axis
  • a reference line on a graph, such as the x-axis or y-axis
    axis
  • a model used to show how a function changes an input into an output
    function machine
  • the point where the x-axis and y-axis meet, shown as (0,0)
    origin
  • a pair of numbers used to show the exact position of a point on a graph
    coordinate
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