Question

If a line passes through (1, 1) and (2, 2) then find the angle made by the line with x-axis.

• A. 30°
• B. 45°
• C. 60°
• D. 90

Answer 1

The correct option is B 45°

Slope $=\frac{y_2-y_1}{x_2-x_1}=\frac{2-1}{2-1}=1$

$\Rightarrow \tan \theta =1$

$\therefore \theta ={45}^{\circ }$

The angle formed by the line with x-axis is 45°.

So, option b is correct.