The linear equation such that each point on its graph has an ordinate four times its abscissa is: 

If (2^x)(2^y) = 8 and (9^x)(3^y) = 81 , then ( x , y ) is : 

If a linear equation is of the form x = k, where k is a constant, then graph of the equation will be 

The graph of the equations 25x + 75y = 225 and x = 9 meet the point: 

The area bounded by the lines x = 0, y = 0, x + y = 1, 2x + 3y = 6 (in square units) is 

Find co-ordinates of the midpoint of the segment joining points C (3, -5) and D ( -7,3) 

Reflection of the point (-1, 4) in the x-axis is: 

The slopes of two lines are 1 and √3. What is the angle between these two lines?