Question

What is the point-slope form of a line with slope -5 that contains the point (2, -1)?

Answer 1

Point slope formula: 
$y-y_1=m(x-x_1)$
We know that:
y1=-1
x1=2
m=-5 
So we plug those into the formula
$y-(-1)=-5(x-2)$
negative + negative= positive so.. 
Final answer:
$y+1=-5(x-2)$

Answer 2

Point slope form
y-y1=m(x-x1) where
m=slope and you are given a point (x1,y1)

slope=-5
point is (2,-1)
x1=2
y1=-1
m=-5

so
y-(-1)=-5(x-2)
y+1=-5(x-2) is answer