Answer:
[tex] \huge \orange{ - \frac{13}{22} } \\ [/tex]
Step-by-step explanation:
The slope of a line given two points can be found by using the formula
[tex]m = \frac{ y_2 - y _ 1}{x_ 2 - x_ 1}\\[/tex]
From the question we have
[tex]m = \frac{25 - - 14}{12 - 78} = \frac{25 + 14}{ - 66} = - \frac{39}{66} = - \frac{13}{22} \\ [/tex]
We have the final answer as
[tex] - \frac{13}{22} \\ [/tex]
Hope this helps you
