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Plotting Linear Graphs

REPRESENTATIONAL
MathematicsAlgebra|Ages 12—14|ID: mt_-3udyo6VyB

Plot linear graphs by generating a table of values, reduce a two-variable linear equation to the form y = mx + c, and calculate gradients from two points on a line

Mastery Evidence

  • Generate a table of (x, y) values for a linear equation and plot the points accurately
  • Rearrange an equation such as 2x + 3y = 12 into the form y = mx + c
  • Calculate the gradient between two coordinate points using rise over run

Assessment Prompt

“Can [child] draw the graph of a straight line by making a table of values and plotting the points — and work out the gradient from two points on the line?”

Curriculum Standards5 alignments

8.F.1Common Core State Standards for Mathematics
Function definition and graphs

Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output.

F
8.F.4Common Core State Standards for Mathematics
Constructing linear functions

Construct a function to model a linear relationship between two quantities. Determine the rate of change and initial value of the function from a description of a relationship or from two (x, y) values, including reading these from a table or from a graph. Interpret the rate of change and initial value of a linear function in terms of the situation it models, and in terms of its graph or a table of values.

F
KS3.Maths.Alg.10The national curriculum in England
Interpret Mathematical Relationships

interpret mathematical relationships both algebraically and graphically

Mathematics · Key Stage 3
KS3.Maths.Alg.11The national curriculum in England
Standard Form of Linear Equations

reduce a given linear equation in 2 variables to the standard form y = mx + c; calculate and interpret gradients and intercepts of graphs of such linear equations numerically, graphically and algebraically

Mathematics · Key Stage 3
KS3.Maths.Alg.9The national curriculum in England
Graphs of Linear and Quadratic Functions

recognise, sketch and produce graphs of linear and quadratic functions of 1 variable with appropriate scaling, using equations in x and y and the Cartesian plane

Mathematics · Key Stage 3

Prerequisites2

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