Key learning points

1. Graphs can be described by looking at how quickly they fall.
2. The amount y decreases when x increases by one is the rate of change and is called the gradient.
3. The gradient will be negative if y decreases as the graph moves to the right.
4. The gradient can be found from any linear graph.
5. The gradient tells us important information about the relationship.

Common misconception

Keywords

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

• Absolute value - The absolute value of a number is its distance from zero.

• Parallel - Two lines are parallel if they are straight lines that are always the same (non-zero) distance apart.