Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 5 - No. 38)
What do you need to know to calculate the gradient of a straight line on a graph?
Two points on the line
The y-intercept
The equation of the line
The area under the line
הֶסבֵּר
The gradient can be found by using rise/run, based on two points on the line.