Question

I need help finding an equation of the line with the slope=-2, containing the points (3,-1).

Answer 1

y=mx+b, plug in the values for x, y and the slope to find b

Answer 2

one form is

y - y1= m( x- x1)
where m is the slope and (x1,y1) is a point on the line

Answer 3

-1=(-2)(3)+b
-1=-6+b
b=5
y=-2x+5

Answer 4

Here is a list of different forms of an equation for a line
http://en.wikipedia.org/wiki/Linear_equation#Forms_for_2D_linear_equations

I gave you point-slope
emilie showed you slope-intercept

Answer 5

thank you.