To understand the equation of a line which is parallel to x axis, let us consider the figure given below.

In the figure above, clearly the line L is parallel to x-axis and passing through (0, k) on y- axis.

So, the equation of a line parallel to x axis is

**y = k**

**Note :**

If the line is passing through some other value on y axis, we have to replace "k" by that value.

Apart from the equation of a line which is parallel to x axis, let us look at some other different forms of equation of straight line.

The different forms of equation of straight line are,

(i) Slope intercept form

(ii) Point slope form

(iii) Two point form

(iv) Intercept form

Let us look at the above different forms of equation of straight line in detail.

Here,

**Slope of the line = m **

**y-intercept = b**

Here,

**Slope of the line = m **

**Point = (x _{1}, y_{1})**

Here, the two points are

**(x _{1}, y_{1}) and (x_{2}, y_{2})**

Here,

**x- intercept = a**

**y- intercept = b**

Apart from the above forms of equation of straight line, there are some other ways to get equation of a straight line.

1. If a straight line is passing through a point (c, 0) on x-axis and parallel to y-axis, then the equation of the straight line is

**x = c**

**2. Equation of x-axis is y = 0.**

(Because, the value of "y" in all the points on x-axis is zero)

**3. Equation of y-axis is x = 0.**

(Because, the value of "x" in all the points on y-axis is zero)

**4. General equation of a straight line is**

ax + by + c = 0

Apart from the given above, if you need any other stuff in math, please use google custom search here.

If you have any feedback about our math content, please mail us :

**v4formath@gmail.com**

We always appreciate your feedback.

You can also visit the following web pages on different stuff in math.

**WORD PROBLEMS**

**Word problems on simple equations **

**Word problems on linear equations **

**Word problems on quadratic equations**

**Area and perimeter word problems**

**Word problems on direct variation and inverse variation **

**Word problems on comparing rates**

**Converting customary units word problems **

**Converting metric units word problems**

**Word problems on simple interest**

**Word problems on compound interest**

**Word problems on types of angles **

**Complementary and supplementary angles word problems**

**Trigonometry word problems**

**Markup and markdown word problems **

**Word problems on mixed fractrions**

**One step equation word problems**

**Linear inequalities word problems**

**Ratio and proportion word problems**

**Word problems on sets and venn diagrams**

**Pythagorean theorem word problems**

**Percent of a number word problems**

**Word problems on constant speed**

**Word problems on average speed **

**Word problems on sum of the angles of a triangle is 180 degree**

**OTHER TOPICS **

**Time, speed and distance shortcuts**

**Ratio and proportion shortcuts**

**Domain and range of rational functions**

**Domain and range of rational functions with holes**

**Graphing rational functions with holes**

**Converting repeating decimals in to fractions**

**Decimal representation of rational numbers**

**Finding square root using long division**

**L.C.M method to solve time and work problems**

**Translating the word problems in to algebraic expressions**

**Remainder when 2 power 256 is divided by 17**

**Remainder when 17 power 23 is divided by 16**

**Sum of all three digit numbers divisible by 6**

**Sum of all three digit numbers divisible by 7**

**Sum of all three digit numbers divisible by 8**

**Sum of all three digit numbers formed using 1, 3, 4**

**Sum of all three four digit numbers formed with non zero digits**

**Sum of all three four digit numbers formed using 0, 1, 2, 3**

**Sum of all three four digit numbers formed using 1, 2, 5, 6**

HTML Comment Box is loading comments...