ITPEC IP April 2020 Question 72
ITPEC IP April 2020 — Question 72 of 100
Graph (b) shows negative correlation. As temperature increases along the horizontal axis, total sales generally decrease along the vertical axis, so the points form a downward trend.
Answer (b)
Why not others:
- (a) has an upward trend and therefore positive correlation
- (c) stays roughly level and suggests little correlation
- (d) is widely scattered without a clear linear direction
Key rule: Negative correlation means that larger values of one variable tend to accompany smaller values of the other; it does not by itself prove causation.
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