The inclination of a point is 60°. The slope of the line is :

1. $\dfrac{1}{\sqrt3}$

2. $-\dfrac{1}{\sqrt3}$

3. ${\sqrt3}$

4. $-{\sqrt3}$

For the equation 2x - 5y = 8; slope is :

1. 5

2. $-\dfrac{2}{5}$

3. 8

4. $\dfrac{2}{5}$

If the slope of a line is -2 and its y-intercept is -7, the equation of the line is:

1. 2x + y + 7 = 0

2. 2x - y + 7 = 0

3. 2x - y - 7 = 0

4. 2x + y - 7 = 0

For the equation x - y + 1 = 0; the values of slope (m) and y-intercept (c) are :

1. m = 1, c = 1

2. m = -1, c = 1

3. m = 1, c = -1

4. m = -1, c = -1