Question

Find the equations of the line joining the points
A (1, 1) and B (2,3)​

Answer 1

Answer:

2x-y-1=0.

Step-by-step explanation:

Two points - Slope form.

Let (1,1) be (x1,y1) and (2,3) be (x2,y2).

Then,

$y - y1 = \frac{y2 - y1}{x2 - x1} \times (x - x1)$

On substituting the value, we have,

$y - 1 = \frac{3 - 1}{2 - 1} \times (x - 1)$

$y - 1 = 2(x - 1)$

$2x - 2 = y - 1$

$2x - y - 1 = 0$

Therefore, the equation of the line is 2x-y-1=0.

Hope it helps you.

Good Luck.