Question 634825
Slope of the line = Gradient 

Gradient = m

{{{m=(y2-y1)/(x2-x1)}}} 

In this case :
y1 = -5
y2 = -8
x1 = 3
x2 = -9

Insert the formula :
{{{m=(y2-y1)/(x2-x1)}}} 

So,
{{{m=((-8)-(-5))/(-9-3)}}}

{{{m=-3/-12}}}

{{{m=1/4}}}