4 is.
Without the inclusion of an equality sign and not knowing the plus or minus values of the given terms it can't be considered to be a straight line equation
2.3
11
9
It is: 5
It would be perpendicular to a line with the equation Y = 1/8 X.
The slope of the graph of that equation is -1.
8 lol :]
Slope = 3
Well, to answer your question,
the slope is -1/3
The slope is 5.