Key learning points

1. The gradient can be found from two points by considering the change in y over the change in x
2. The y-intercept can be found using the gradient and one of the points.
3. By substituting the gradient and one coordinate pair into the general equation, you can find the y-intercept.
4. The y-intercept occurs when the x value is zero.
5. It is useful to check using the second point while understanding the limitations of this check.

Common misconception

Keywords

• Gradient - The gradient is a measure of how steep a line is. It is calculated by finding the rate of change in the y-direction with respect to the positive x-direction.

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