equation of a line

[tamiatha]

what is the equation of horizontal line that passes through the point at (-2,-3)
loren and i thought point slope formula should be used
i can't use that because i only i one pair of coordinates
how do i get the answer to this problem
thnak you

 

[royhaas]

A horizontal line has a slope of zero.

 

[pka]

The horizontal line through \(\displaystyle (p,q)\) is \(\displaystyle y=q\).

The vertical line through \(\displaystyle (p,q)\) is \(\displaystyle x=p\).

 

[tamiatha]

i still do not understand how to solve the problem
please help me more

 

[Deleted member 4993]

what is the equation of horizontal line that passes through the point at (-2,-3)

what is the equation of a line with slope 'm' and passing through point (x[sub:2nucwu6v]1[/sub:2nucwu6v],y[sub:2nucwu6v]1[/sub:2nucwu6v])?


loren and i thought point slope formula should be used
i can't use that because i only i one pair of coordinates
how do i get the answer to this problem
thnak you

 

[tamiatha]

y = mx = b ?

 

[Deleted member 4993]

y = mx + b ?

No...

y = mx + b

is the equation of a line with slope "m" and "y-intercept" of "b".

You need to know the equation of a line with slope "m" and passing through (x[sub:1l579n76]1[/sub:1l579n76],y[sub:1l579n76]1[/sub:1l579n76])

For quick review go to:

http://www.purplemath.com/modules/strtlneq2.htm