Learn all Concepts of Linear Equations Class 9 (with VIDEOS). Check - Linear Equations in 2 Variables Class 9
Let us plot points (1, 0) (2, 0) (4, 0) (−2, 0) on the graph
All points in x-axis are like
(1, 0) (2, 0) (4, 0) (−2, 0)
So y = 0 for all points in x − axis
∴ Equation of x axis is y = 0