GCSE Maths (Edexcel)

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Algebra Graphs

Real Life Uses of Linear Graphs

3:46 plot graphs of equations that correspond to straight-line graphs in the coordinate plane; use the form y = mx + c to identify parallel and perpendicular lines; find the equation of the line through two given points or through one point with a given gradient
Spec A9 A10
Previous Midpoints Next Straight Line Graphs
  • The gradient of a graph represents a rate of change
  • The gradient tells us how much the line goes up for every one unit it goes along the x axis
  • The physical meaning of the gradient can be determined by looking at the labels on the axes
  • A steeper gradient represents a greater rate of change
  • The initial value can be found using the y intercept
  • The gradient can be calculated by finding any two coordinates on the line and using the formula
  • The gradient represents the rate of change in the given quantity
  • The rate of increase can be determined by the value of the gradient

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310

questions for Algebra

95

questions for Graphs