1988 AHSME Problems/Problem 29
Problem
You plot weight against height for three of your friends and obtain the points . If and , which of the following is necessarily the slope of the line which best fits the data? "Best fits" means that the sum of the squares of the vertical distances from the data points to the line is smaller than for any other line.
Solution
Apply one of the standard formulae for the gradient of the line of best fit, e.g. , and substitute in the given condition . The answer is .
See also
1988 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 28 |
Followed by Problem 30 | |
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