Answer: A
Explanation:
For there to be a negative association between x and y, the slope of the graph must be negative (so when x is increasing, y is decreasing).
- From this, we can immediately eliminate sets B and D.
Now, we just need to determine which one has a linear relationship.
- For set A, we see a constant decrease of 1 in the value of y for each time x increases by 1, so this is linear.
- For set C, there is no consistent decrease in the value of y for each time x increases by 1, so this is not linear.