Tool to compute a slope from 2 points. The slope coefficient of a line indicates the variation of the y-coordinate when the x-coordinate increments of 1 unit.

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Tool to compute a slope from 2 points. The slope coefficient of a line indicates the variation of the y-coordinate when the x-coordinate increments of 1 unit.

Answers to Questions

How to calculate slope coefficient?

From 2 points A(x1,y1) and B(x2,y2), the calculation formula of the slope coefficient of the line or the segment passing through points A and B is the result of fraction : $$ \frac{y2-y1}{x2-x1} $$

Example: An affine function goes through 2 points A(1,2) and B(3,4), the slope value is \( \frac{4-2}{3-1} = \frac{2}{2} = 1 \)

What is the slope coefficient of a vertical line?

If a line is vertical then the slope coefficient is infinity.

What is the slope coefficient of an horizontal line?

If a line is vertical then the slope coefficient is 0. This is sometimes the case of a tangeant or an asymptote.

How to demonstrate that 2 lines are parallel?

Two lines are parallel if and only if their directors coefficients are equal.

How to demonstrate that 2 lines are perpendicular?

Two lines are perpendicular if and only if the product of their slope coeffifients is -1.

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