# 1. The graph of a linear equation in two variables is a _____________________line. 2. The general form of linear equation in two variables is ________

1. The graph of a linear equation in two variables is a _____________________line.
2. The general form of linear equation in two variables is _______________________.
3. Linear equations in three variables are expressed as _________________________.
4. The number of variables in is __________________________.
5. The solution of a linear equation always ________________________ the equation.
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1) We know that, the linear equation in two variable is given by $ax+by=c$ for a and b not both zero.
So the graph of $ax+by=c$ is straight line.
Thus, the graph of linear equation in two variable is always a straight line.
2) As mentioned in part 1) the general form of linear equation in two variables is
$ax+by=c$ where ane0 and bne0.
3) On the similar lines, the linear equation in three variables are expressed as,
$ax+by+cz=d$ where a, b and c are not all zero simultaneously.