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Lines parallel to x-axis
Equation of x-axis is
y = 0
Equation of lines which are parallel to x-axis is
y = k
where k is a constant
Let us check an example
y = 2
Drawing y = 2 in graph
Since y = 2 for all values of x
Points which satisfy the equation is
x |
0 |
1 |
2 |
–1 |
y |
2 |
2 |
2 |
2 |
Plotting points on graph
Hence, y = 2 is line which is parallel to x axis
Lines parallel to y-axis
Equation of y-axis is
x = 0
Equation of lines which are parallel to y-axis is
x = k
where k is a constant
Let us check an example
x = 1
Drawing x = 1 in graph
Since x = 1 for all values of y
Points which satisfy the equation is
x |
1 |
1 |
1 |
1 |
y |
0 |
1 |
2 |
–1 |
Plotting points on graph
Hence, x = 1 is line which is parallel to x axis