Verified Answer :

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:
\(y+1=-5(x-2)\)

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