# Thread: Finding equation of a line given two points.

1. ## Finding equation of a line given two points.

need help with this question If a line passes through the points (-2, -4) and (3, -1), the equation of the line is y + 4 = 3/5(x + _____).

2. Using slope point form:y-y1=m(x-x1)
where m=(y2-y1)/(x2-x1)
Equation of line is

5y+20=3x+6
=>y+4=3/5(x+2)

so the answer is 2 in the fill in the blanks .

3. See it like this:

If $\displaystyle f(x)= ax+b$ is the line passing through the given points:

First we have: $\displaystyle f(-2)= -2a+b=-4$
$\displaystyle f(3) = 3a+b = -1$

From these 2 equations you can determine a,b

4. Originally Posted by daniel323
need help with this question If a line passes through the points (-2, -4) and (3, -1), the equation of the line is y + 4 = 3/5(x + _____).
Duplicate post. See here: http://www.mathhelpforum.com/math-he...help-asap.html