What formula should be used when factoring the expression xº + 2/?
pression x3 + 277
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po 23+63 = (a+b)(a2-ab+62)
ob 23+63 - (a-b)2(a+b)
os 23+63-(a+b)2(a-b)
23+63-(a-b)(a2 + ab +62)
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Use a calculator to verify that σ(x) = 62, σ(x2) = 1034, σ(y) = 644, σ(y2) = 93,438, and σ(x y) = 9,622. compute r. (enter a number. round your answer to three decimal places.) as x increases from 3 to 22 months, does the value of r imply that y should tend to increase or decrease? explain your answer. given our value of r, y should tend to increase as x increases. given our value of r, we can not draw any conclusions for the behavior of y as x increases. given our value of r, y should tend to remain constant as x increases. given our value of r, y should tend to decrease as x increases.