Slope of a line

How to find slopes of a line ? Explain by giving one example.

Find the slope of the line with inclination 60^(@) .

The slope of the line ax + by + c = 0 is "_______" .

The slope of the line of regression of y on x is called the ______

What is the slope of the line perpendicular to X-asis?

Find the slope of the line whose inclination is : 60^0

In Freundlich adsorption isothem, slope of AB line is :

Find the slope of the line whose inclination is : 0

What is the slope of the line parallel to X-axis ?

If the slope of one of the lines represented by ax^(2)+(3a+1)xy+3y^(2)=0 be reciprocal of the slope of the other, then the slope of the lines are