The following table shows the weight of a person and the number of hour of exercise they do. Weight 250 180 160 140 135 Hour 0 7 5 8 9 Construct a table with these headings: x-xbar, y-ybar, (x-xbar)2, (y-ybar)2, (x-xbar)(y-ybar), y-^y, and (y-^y)2. Note: ^ symbol is on top of y.  xbar is the mean for weight. ybar is the numbers of hours. ^y=a+bx where ^y is the best line of fit.  Find: a) xbar b) ^y c) b in the equation ^y=a+bx d) a '' '' '' (for each) e) r (the correlation coefficient)

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.