45. Homer’s car has run out of gasoline. He walks 12 km west and then 5 km south looking for a gasoline station. If he is now h
km directly from his starting point, find the value of h.
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If the null hypothesis, 
is rejected, then we can conclude that the correlation coefficient is significant. This means that there is enough evidence to conclude that a relationship exists between the two (or more) variables involved in the regression.