Explanation:
the slope is in the form
y = ...
always the factor of x.
now, to bring
y - 3 = -4(x - 5)
into the form
y = ...
is not difficult. we just need to add 3 an both sides and get
y = -4(x - 5) + 3
that "+3" at the end does not change the multiplication factor for x : -4
so, the answer is -4 or -4/1.