Question

The graph models the linear relationship between thetemperature of Earth's atmosphere and the altitude abovesea level. Which of these best represents the rate of changeof the temperature with respect to altitude? (5.)

Answer 1

Notice that the points (4,-10) and (7,-30) are very close to the line, then the slope of the line that passes through those points is a good approximation of the slope of the given line.

Using the two points formula for the slope of a line we get:

`s=(-30-(-10))/(7-4)=-(20)/(3)\approx-6.67.`

Therefore the slope of the given line is close to -6.67.

Answer: Option A.