equation of a line from two points

Let us learn about equation of a line from two points

If Students are given 2 points, how can they find the equation of the line passing through the 2 points? If student know the slope & a point (x₁, y₁) student have that

rise y - y₁
m = =
run x - x₁

Now multiplying by

x - x₁

equation of a line from two points Point Slope Formula for the Equation of a Line

y - y₁ = m (x - x₁)

Find the equation of line from the point (1,2) with slope 4.

Solution:

We use the formula:

y - 2 = 4(x - 1) = 4x - 4 Therefore y = 4x - 4 + 2 = 4x - 2.

In our next blog we shall learn about how to calculate ratios I hope the above explanation was useful.Keep reading and leave your comments.