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Coordinates

Co-ordinates involve plotting an x (horizontal) co-ordinate and a y (vertical) co-ordinate.

Point (2,1)

Point (2,1)

  • The point (2,1) has x-coordinate 2 and y-coordinate 1.
Axes

Axes

  • The x-axis is the horizontal axis. On the x axis, the y co-ordinate is 0.
  • The y-axis is the vertical axis. On the y axis, the x co-ordinate is 0.

Straight Line Graphs

Vertical lines

Vertical lines

  • Vertical lines are written as:
    • x = 2
Horizontal lines

Horizontal lines

  • Horizontal lines are written as y = a:
    • y = 1
Straight lines through the origin

Straight lines through the origin

  • Sloping lines are written as y = mx.
  • m tells you the gradient of the line.
    • If m is negative the graph slopes down from top left to bottom right.
    • The larger m is, the steeper the slope of the line is.
Jump to other topics
1

Numbers

2

Equations, Formulae & Identities

3

Sequences, Functions & Graphs

4

Geometry

5

Vectors & Transformation Geometry

6

Statistics & Probability

Practice questions on Plotting Graphs

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