More Algebra help :(?
Find an equation of the line containing the given pair of points.
(-5,-3) & (-9,-4)
The equation of the line in slope intercept form form is y=?
Thanks in advance for any help!
It's been too long since I've done this stuff.
- Mike GLv 79 years agoFavorite Answer
slope = (-4- - 3)/(-9- -5) = -1/-4 = 1/4
4y = x - 7
y = x/4 - 7/4
- Anonymous9 years ago
Okay first we find the slope.
It's rise over run:
Now that you have the slope, you should know that we can write the equation of a line with its slope and a given point of (x1,y1):
- 9 years ago
y=mx + b, m is the slope, b is the y intercept.
slope = (y2-y1) / (x2-x1)
m = -1.5
so we have y=-1.5x + b.
Substitute x and y to get b.
-1 = -1.5*-9 +b
-1 = 13.5 +b
so, y = -1.5x -14.5