How do i find the equation of a horizontal line?
I already know two points. They are (3, -1) and (3, 1)
- 1 decade agoFavorite Answer
x = 3
- jon144auLv 61 decade ago
A horizontal line will have two points with same same y-value.
The equation for slope is (y2-y1)/(x2-x1), and if both y-values are equal, the slope will equal zero, and you have found yourself a horizontal line.
In this case, you have a vertical line, in which the x-values are equal. If you insert both into the slope equation, you will end up with a zero in the denominator, which results in an undefined slope.
An easy way to remember all of this is this simple phrase:
What this means is that a horizontal line will have a slope of 0, and be a y = an integer equation, and a vertical line will have an undefined slope, and be expressed with x = an integer.
- ?Lv 41 decade ago
You have wrong information here. The line that passes through the points you gave is VERTICAL.
The equation of every vertical line is x = constant. In this case
x = 3 VERTICAL LINE.
If you want the equation of a horizontal line, it will be y = constant, but will not work with the two points you have
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- Anonymous1 decade ago
This line would actually be vertical. Because the X value of the function is 3 regardless of the Y value, we say x=3. X is always equal to 3, no matter what.
- 1 decade ago
this is a vertical line,
think horizontal = horizon (sun) ;-)
so this means that x=3
To explain further:
lets see if this works;
when y= -1 x is still equal three
when y= 1 x is also still equal to three
you get the points (3,-1) and (3.1)
HOPE THIS HELPS, BEST ANSWER ;-)
- 1 decade ago
This is a vertical line, and x=3
It's a vertical line. You can graph it 'cause it is confusing to explain with words. The slope is undefined, the equation is x=3
This is a vertical line, It has no slope.
it is X=3
x = 3 both your x coordinates are the sameSource(s): AP math