Answer
Negative correlation
Work Step by Step
We use a graphing calculator to plot the points $(x,y)$, where $x$ represents the number of years after $1988$ (calculated from row $1$ in the given table) and $y$ represents the shipment of cassettes (row $2$ in the given table).
From the graph we notice that when $x$ increases, $y$ decreases, so the correlation between the year and the shipment of cassettes is $\text{negative}$.
