S1 : The graph of a linear equation is a straight line
S2 : The solution of a pair of linear equations is a point common to two lines.
If in general quadratic equation f(x,y) = 0,△=0
and a + b = 0, then the equation represents
If the equations in a system of two linear equations in two variables are graphed, each graph will be a line. Which of the following System of Linear equations will have only one solution ?