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Question 20N.1A.SL.TZ0.27

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1A.SL.TZ0.27
Level SL Paper 1A Time zone TZ0
Command term Question number 27 Adapted from N/A
27.
[Maximum mark: 1]
20N.1A.SL.TZ0.27

The graph shows the results of measuring two factors in the blood of patients with HIV/AIDS.

[Source: Courtesy ACRIA.]

 

What do X and Y represent?

[1]

Markscheme

A

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