# Week 7 tests.docx - Question 1 of 20 0.0/ 1.0 Points Due to...

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Question 1 of 200.0/ 1.0 PointsDue to erosion, a river shoreline is losing several thousand pounds of soil each year. A linearequation that expresses the total amount of soil lost per year is y = 12,000x.How many pounds of soil does the shoreline lose in a year? Round to a whole number. Don't useany commas or decimals.
Question 2 of 201.0/ 1.0 PointsWhich of the following equations are linear?
D.y-x=8x2Answer Key:BFeedback:A linear equation is a linear line. If a problem has a squared or a cubed term, it isn't linear. It is aquadratic equation.Part 2 of 9 - Multiple Linear Regression3.0/ 4.0 PointsQuestion 3 of 201.0/ 1.0 PointsWith Obesity on the rise, a Doctor wants to see if there is a linear relationship between the Ageand Weight and estimating a person's Systolic Blood Pressure. Interpret the slope(s) of thesignificant predictors for Systolic BP (if there are any).See Attached Excel for Data.BP data.xlsx9 KBA.When you hold Weight constant, as Age increases by 1 year, your Systolic BP willincrease by 0.9388When you hold Age constant, as Weight increases by 1 pound, your Systolic BP willincrease by 0.3092B.When you hold Weight constant, as Age increases by 1 year, your Systolic BP willincrease by 4.0792When you hold Age constant, as Weight increases by 1 pound, your Systolic BP will
Feedback:You can run a Multiple Linear Regression in Excel using the Data Analysis ToolPak.Data -> Data Analysis -> Scroll to RegressionHighlight Systolic BP for the Y Input:Highlight Both Age and Weight columns for the X Input:Make sure you click on Labels and Click OKIf done correctly then you look under the Coefficients for the values to write out the RegressionEquationCoefficientsIntercept31.73252234Age in Yrs.0.938835263Weight in lbs.0.309246373Systolic BP = 31.73252234 + 0.938835263(Age) + 0.309246373(Weight)You need to interpret the slope coefficients for all significant predictors.When you hold Weight constant, as Age increases by 1 year, your Systolic BP will increase by0.9388When you hold Age constant, as Weight increases by 1 pound, your Systolic BP will increase by
0.3092

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