What is the slope of the line passing through the following points: #(-1, -2), (4,-5)#?
Slope (gradient) is the amount of up or down for the amount of along. Like the incline on a hill.
Always read from left to right. If you go up reading left to right then it is a positive gradient. If you go down reading left to right then it is a negative gradient.
A memory jog could be "Why is this one on top".
Let Point 1
Let Point 2
Let gradient be
This is negative so for 5 along it goes down 3.