Passage I

A team of researchers constructed a greenhouse, consisting of 3 artificially lighted and heated sections, to be used to grow food during a long space voyage. The researchers found the weekly average light intensity, in arbitrary units, and the weekly average air temperature, in degrees Celsius (°C), in each section. The results for the first 6 weeks of their measurements are given in Table 1 (weekly average light intensity) and Table 2 (weekly average air temperature).