y + 7 = -4(x - 2)
The equation for point slope form is 
y - y1 = m(x - x1) where m represents the slope. 
It coordinates and slope are given, they just need to be plugged into the equation. 
y - (-7) = -4(x - 2)
Subtracting a negative can be written as adding a positive, so the equation can be simplified as: 
y + 7 = -4(x - 2)