Final answer:
a. The slope of the line connecting the two points (0.2, 350) and (0.8, 430) is approximately 133.33. Thus, there is no correct option.
b. For every 1 unit increase in call duration, the altitude increases by approximately 133.33 units. Thus, there is no correct option.
Step-by-step explanation:
The slope of a line can be found using the formula: slope = (y₂ - y₁) / (x₂ - x₁), where (x₁, y₁) and (x₂, y₂) are the coordinates of two points on the line.
In this case, the two points are (0.2, 350) and (0.8, 430). Plugging these values into the formula, we get:
slope = (430 - 350) / (0.8 - 0.2) = 80 / 0.6 = 133.33
Thus, the slope of the line connecting the two points is approximately 133.33.
To interpret the slope, we can use the concept of rise over run. In this case, the rise is the change in y-values (altitude) and the run is the change in x-values (call duration).
Thus, the slope of the line indicates that for every 1 unit increase in call duration, the altitude increases by approximately 133.33 units.
Therefore, the correct answer is
a. 133.33 (no correct option)
b. The altitude increases by 133.33 unit in call duration (no correct option).