Write the equation of the line in slope-intercept form with the given point and the slope or two points.
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For this case, the first thing we must do is define variables.
We have then:
x: altitude of the plane in feet
y: final temperature
The equation modeling the problem for this case is given by:
Thus, evaluating the function for x = 11,000 ft. Height we have:
Answer:
the temperature at an altitude of 11,000 ft is 47.6 F
Put the values of the variables in place of the variables in the expression, then do the arithmetic.