The points (x,y) represented in this table lie on a straight line. The point (13,q) lies on the same line. What is the value of p + q? Express your answer as a decimal to the nearest tenth.
\(\begin{array}{c|c} x & y \\ \hline 2 & 5 \\ p & -14 \\ -2 & -17 \\ \end{array}\)
