BestMaths Online

Summary

linear functions have graphs which are straight lines.

the general equation of a linear function is ax + by + c = 0.

the exponents of both the x term and the y term are 1.

another often used form of linear functions is y = mx + c.

Key Skills

• recognise that a function has a straight line graph
• sketch the graph of a linear function by plotting points
• find the x and y-intercepts of linear functions
• use the gradient / intercept form of a linear functions i.e. y = mx + c

Vocabulary

linear function, cartesian graph, coordinates, ordered pair, origin,gradient, vertical, horizontal, spreadsheet, x-intercept, y-intercept, x-axis, y-axis.