SOLUTION
[tex]Given\text{ y=-17}[/tex][tex]\begin{gathered} Comparing\text{ the y=-17 with y=mx+c \lparen slope-intercept form of straight line \rparen} \\ where\text{ c= intercept on y-axis} \\ m=slope \end{gathered}[/tex][tex]\begin{gathered} \Rightarrow m=0 \\ \end{gathered}[/tex]The slope is zero.
