Answer
slope = $-\dfrac{1}{2}$
Refer to the image below for the graph.
Work Step by Step
RECALL:
The slope $m$ of a line can be found using the formula $m=\dfrac{y_2-y_1}{x_2-x_1}$ where $(x_1, y_1)$ and $(x_2, y_2)$ are points on the line.
(i) Using the two given points on the line, solving for $m$ gives:
$m=\dfrac{3-1}{-2-2}=\dfrac{2}{-4}=-\dfrac{1}{2}$
(ii) Plot the points on the same coordinate plane, then connect them using a straight line to complete the graph.