ANSWER
4/5
EXPLANATION
The slope of a line is given by,
[tex]m=\frac{rise}{run}[/tex]
In this roof, the rise is the height of the roof, 12ft, and the run is half the width of the roof, 15ft,
[tex]m=\frac{12ft}{15ft}=\frac{4}{5}[/tex]
Hence, the pitch is 4/5.
