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Common Functions

To sketch a graph, see if it is linear, quadratic or cubic. Then plot some x and y co-ordinates and join them up in the right shape.

Linear

Linear

  • Linear functions are straight lines in the form y = mx + c.
Quadratic

Quadratic

  • Quadratic functions have an x2 term.
  • They are in the form y = ax2 + bx + c.
Cubic

Cubic

  • Cubic functions are in the form y = ax3 + bx2 + cx + d.
  • If a > 0, it starts in the bottom left and goes up to the right.
  • If a < 0, it starts in the top left and goes down to the right.
Jump to other topics
1

Number

1.1

Using Numbers

1.2

Fractions, Decimals & Percentages

1.3

Powers & Roots

1.4

Accuracy

2

Algebra

2.1

Introduction to Algebra

2.2

Manipulating Algebra

2.3

Proofs & Functions

2.4

Straight Line Graphs

2.5

Common Graphs

2.6

Transformations & Tangents

2.7

Properties of Graphs

2.8

Solving Equations

2.9

Inequalities

2.10

Sequences

3

Ratio

4

Geometry

4.1

Introduction to Geometry

4.2

Triangles & Quadrilaterals

4.3

Transformations

4.4

Circle Basics

4.5

Circle Theorems

4.6

Measurements & Units

4.7

Calculating Area

4.8

Triangle Formulae

4.9

3D Shapes

4.10

Vectors

5

Probability

6

Statistics

Practice questions on Common Functions 1

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