Linear function

Learn linear functions from scratch, see simple examples, and move on to exercises with linear equations and inequalities.

Theory from scratch

Graph and formula

Step-by-step exercises

Learning

Linear function theory

Short explanations, illustrations, and examples that help you understand the formula y = ax + b.

Practice

Solve examples step by step, check the zero of a function, and analyze the solution graph.

Theory and examples

Short lessons show where the results in exercises come from. Start with the basics or go straight to the graph, formula, or zero of a function.

The simplest explanation of what a linear function is and how to read its formula.

What the numbers a and b mean in y = ax + b and how they affect the line.

How to draw a line from a table, two points, or directly from the formula.

How to find the X-axis intercept and what the result of ax + b = 0 means.

Practice tasks step by step, check the zero of a function, and see the solution on a graph.