What is the formula to find the slope graphically?
The slope formula is used to find the slope of a line that joins two points (x₁, y₁) and (x₂, y₂). Using this formula, the slope of the line is, m = (y₂ - y₁) / (x₂ - x₁). We can use the same formula to find the slope of a line from its graph also.
What does δ mean in finding the slope?
Delta's most common meaning is that of difference or change in something. Usually, you will hear or see it as delta y, delta t, delta x, etc. Delta occurs most often when you are working with speed or acceleration or anything that changes. The slope of a line, for example, can be spoken of as delta y over delta x.