Key learning points

1. A linear expression expressed on a graph represents a straight line.
2. This line can be used to find one variable when given the other.
3. A horizontal or vertical line represents a particular value of a variable.
4. Where this meets the linear graph the solution of a linear equation.

Keywords

• Equation - An equation is used to show two expressions that are equal to each other.

• Solution - The solution to an equality is the value which, when substituted, maintains the equality between expressions.

Common misconception