Find the equation of the line that passes through the point (0 , -6) and has a slope equal to 5. 

Find the equation of the line that passes through the point (-2 , 3) and has a slope equal to -2. 

Is there a line that passes through all the following 3 points: A(2 , 3), B(4 , 7) and C(5 , 6). 

Find the equation of the line through the point (3 , 0) and is perpendicular to the line through the points (2 , 1) and (4 , 5).