Key learning points

1. The y-intercept can be found by considering the graph.
2. The y-intercept occurs when the x value is zero.
3. The gradient can be found from two points.
4. The y-intercept can be found using the gradient and one of the points.
5. It is useful to check using the second point while understanding the limitations of this check.

Keywords

• Gradient - The gradient is a measure of how steep a line is.

• Intercept - An intercept is the coordinate where a line or curve meets a given axis.

• Linear - The relationship between two variables is linear if, when plotted on a pair of axes, a straight line is formed.

Common misconception