The equation of a line in the point slope form is expressed as
y - y1 = m(x - x1)
Where
m represents slope
y1 represents intial value of y
x1 represents initial value of x
The formula for determining slope is expressed as
m = (y2 - y1)/(x2 - x1)
y2 and x2 are final values of y and x respectively.
From the information given,
x1 = - 1, x2 = - 4
y1 = 4, y2 = 2
Slope = (2 - 4)/(- 4 - - 1)
Slope = - 2/ (- 4 + 1)
Slope = - 2/- 3
m = 2/3
Substituting m = 2/3, y1 = 4 and x1 = - 1 into the point slope equation, it becomes
y - 4 = 2/3(x - - 1)
= y - 4 = 2/3(x + 1)