What is slope?
The slope of a line can be defined as the linear change within a graphed system of two or more coordinates. To find the slope of this graph, we can apply the slope formula and plug in our values.
slope =

Plugging in the values
Now that we have the formula for slope, we can insert the given numbers into the equations to solve:
Slope =

=

The slope of the line is
, but it can be divided by 3 to find that the slope is actually
.
Hence, the slope of the line is -1/2.