The equation of the straight line passing through the point (1, 2) and parallel to the line y = 3x + 1, is:

1. x – 3y + 1 = 0

2. 3x + y + 1 = 0

3. 3x – y – 1 = 0

4. 3x – y + 1 = 0

The slope of the line, ax + by + c = 0, is:

1. $-\dfrac{a}{b}$

2. $-\dfrac{b}{a}$

3. $\dfrac{c}{b}$

4. $\dfrac{b}{a}$

Assertion (A): The slope of the line passing through the points (3, –2) and (–7, –2) is 0.

Reason (R): The gradient (slope) of a line passing through the points (x₁, y₁) and (x₂, y₂) is $\dfrac{x$2 - x1}{y2 - y1}.

1. A is true, R is false

2. A is false, R is true

3. Both A and R are true

4. Both A and R are false

Assertion (A): The angle of inclination of the line y = $\dfrac{x}{\sqrt{3}}$ – 5 is 60°.

Reason (R): The gradient m of a line is given by m = tan θ.

1. A is true, R is false

2. A is false, R is true

3. Both A and R are true

4. Both A and R are false