What is the solution to the system of equations?

y = 2x – 3.5

x – 2y = –14

(–7, 3.5)
(3.5, –7)
(7, 10.5)
(10.5, 7)

9514 1404 393

  The median, because the distribution of wind speeds is skewed.

Step-by-step explanation:

A few higher speeds will raise the mean. For a skewed distribution, the median may be a more appropriate measure of center.

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Additional comment

From an engineering point of view, one might have to consider speeds only within some range, as the wind turbines may be shut down for speeds too low or too high. Likely the power generated is not proportional to speed, so a weighted average (of the square of speed) would probably be more useful. Unfortunately, this question does not get into such subtleties.