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Straight line:
An equation of first degree and of the form \(ax + by + c = 0\) is called as "straight line" in \(xy\) - plane.
Here, \(x\) and \(y\) are variables,
\(a\), \(b\) and \(c\) are real numbers, and atleast one of \(a\), \(b\) are non - zero.
The graphical representation of a straight line is:
Equation of coordinate axes
The \(X\) - axis and \(Y\) - axis together form the graph, and they are called the cartesian plane or the coordinate axes.
A point on the coordinate axes:
If a point lies on the \(x\) - axis, then the coordinate of the point is \((x,0)\).
The equation of a point lying on the \(x\) - axis is \(y = 0\).
Consider plotting the points on the \(x\) - axis and observe the equation we get:
Similarly, if a point lies on the \(y\) axis, then the coordinate of the point is \((0,y)\).
The equation of the point on the \(y\) axis is \(x = 0\).
Consider plotting the points on the \(y\) axis and observe the equation we get:
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