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(c) Use a calculator to verify that S. `x = 60, Sx² = 954, ) y = 640, y² = 91,850, and xy = 9,180. Compute r. As x increases from 3 to 21 months, does the value of r imply that y should tend to increase or decrease? Explain your answer. First, we construct a computation table so that we can calculate the values of x2, y2, and xy. Then we sum each column to compute each summation. y x2 y2 ху 3 60 9 3600 6 95 36 9025 570 12 140 144 1680 18 165 324 2970 27,225 32,400 21 180 441 3780 Sx = 60 = 640 Sxy = 954 %3D

(c) Use a calculator to verify that S. `x = 60, Sx² = 954, ) y = 640, y² = 91,850, and xy = 9,180. Compute r. As x increases from 3 to 21 months, does the value of r imply that y should tend to increase or decrease? Explain your answer. First, we construct a computation table so that we can calculate the values of x2, y2, and xy. Then we sum each column to compute each summation. y x2 y2 ху 3 60 9 3600 6 95 36 9025 570 12 140 144 1680 18 165 324 2970 27,225 32,400 21 180 441 3780 Sx = 60 = 640 Sxy = 954 %3D

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.2: Arithmetic Sequences
Problem 67E
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(c) Use a calculator to verify that x = 60, ▼x² = 954, Ev = 64 increases from 3 to 21 months, does the value of r imply that y should tend to increase or decrease? Explain your answer. First, we construct a computation table so that we can calculate the values of x2, y2, and xy. Then we sum each column to compute each summation. y x2 ,2 ху 60 9. 3600 95 36 9025 570 12 140 144 1680 27,225 32,400 18 165 324 2970 21 180 441 3780 ΣΥ 'x = 60 `y = 640 Ex² = [954
Transcribed Image Text:(c) Use a calculator to verify that x = 60, ▼x² = 954, Ev = 64 increases from 3 to 21 months, does the value of r imply that y should tend to increase or decrease? Explain your answer. First, we construct a computation table so that we can calculate the values of x2, y2, and xy. Then we sum each column to compute each summation. y x2 ,2 ху 60 9. 3600 95 36 9025 570 12 140 144 1680 27,225 32,400 18 165 324 2970 21 180 441 3780 ΣΥ 'x = 60 `y = 640 Ex² = [954
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