Help your students prepare for their Maths GCSE with free graph worksheets of 20+ questions and answers
Graphs are types of diagrams used to visually represent data and relationships. There are many different types of graphs. Graphs are used in algebra to represent functions and the relationship between the variables x and y. Graphs can also be used to represent the relationship between two real life variables, such as distance and time. Finally, charts and graphs such as bar graphs can be used to visually display data.
When it comes to the graphs of algebraic functions, different types of functions will lead to graphs of different shapes. There are six different types of function that we are concerned with: linear, quadratic, cubic, reciprocal, exponential and circle. Each type of function produces a specific shape of graph.
Linear functions involve y and x e.g. y=2x+1.
Quadratic functions involve x2 e.g. y=x2+3
Cubic functions involve x3 e.g. y=5x3 + 3x
Reciprocal functions involve fractions with x in the denominator e.g. y = 1/x
Exponential functions involve x as a power e.g. y=3x
Circle functions are of the form x2+y2=25
Functions often contain coefficients as well as other terms added or subtracted. These coefficients can be whole numbers, negative numbers, decimals or fractions and change the features of the graph without changing its fundamental shape.
To draw line graphs we usually use the equation of the line to create a table of values for x and y, which then gives us the coordinates of some points on the line. It is best to use graph paper when doing line plots to ensure accurate work.
Looking forward, students can then progress to additional types of graph worksheets and on to more algebra worksheets, for example a simplifying expressions worksheet or simultaneous equations worksheet.
For more teaching and learning support on Algebra our GCSE maths lessons provide step by step support for all GCSE maths concepts.
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Lessons are selected to provide support where each student needs it most, and specially-trained GCSE maths tutors adapt the pitch and pace of each lesson. This ensures a personalised revision programme that raises grades and boosts confidence.