The rowan (Sorbus aucupuria )is a tree that grows in a wide range of altitudes. To study how the tree adapts to its varying habitats, researchers collected twigs with attached buds from 12 trees growing at various altitudes in North Angus, Scotland. The buds were brought back to the laboratory and measurements were made of the dark respiration rate. The accompanying table shows the altitude of origin (in meters) of each batch of buds and the dark respiration rate(express as µl of oxygen per hour per mg dry weight of tissue.

	Altitude of origin (m)	Respiration Rate (µl/hr x mg)
	90	0.11
	230	0.20
	240	0.13
	260	0.15
	330	0.18
	400	0.16
	410	0.23
	550	0.18
	590	0.23
	610	0.26
	700	0.32
	790	0.37
Mean
s

 

1. Calculate descriptive statistics 

2. Determine if there is a relationship between the variables and the strength of the relationship

3. Graph and determine the regression line 

4. Interpret the value of the slope in the context of the information provided

5. Determine the rate of respiration when the tree is at 650 m elevation

6. Determine the rate of respiration when the tree is at 950 m elevation