# Writing Linear Equations?

• December 14th 2010, 01:42 PM
Johnathon324
Writing Linear Equations?
How can you write an equation for the lines satisfying these conditions:
Passing through the point (0,4) and having a slope of 3??

Please explain to me and show all work!(Nerd)
• December 14th 2010, 01:46 PM
pickslides
Well the equation of a line is y=mx+c

Where m is the gradient (slope) and c is the y-intercept.

you are told what m is. Subtitute this into the equation, you get y=3x+c.

Finally sustitute in the (x,y) = (0,4) into y=3x+c to solve for c, then you are finished.
• December 14th 2010, 02:54 PM
jgv115
Or you can use the one point formula:

$y - y_{1} = m(x-x_{1})$