Question

6. Hannah weighed 7.2 pounds at birth. Her weight was recorded at each of her infant doctor visits. The records from her appointments from birth to six months are shown in the table below. a) Find the line of best fit: b) Estimate Hannah's weight at her one-year visit: Months Weight (lbs) 0 1 7.2 9.4 10.5 13.2 15.9 7. The table below shows the average life expectancy (in years) based on certain birth years. a) Find the line of best fit: b) Estimate the life expectancy for someone born in 2005: Birth Year 1900 1910 1920 1930 1940 1950 1960 Life Expectancy 47.3 50.0 54.1 59.7 62.9 68.2 69.7 8. The table below shows the relationship between the number of hours a student studied and their grade on a certain test. a) Find the line of best fit: b) Estimate the grade for a student that did not study at all: Test Grade 02 Hours Studying Ona Whon (All Things Algebro. LLC 2012-2017

Answer 1

6.

Use the excel scatter chart to determine the equation of straight line for month vs weight.

Month (x) Weight (y) y = 1.4x + 7.6 R=0.992 Weight (y) 7.2 9.4 10.5 13.2 15.9 • Weight (y) Linear (Weight (y))

The line of best fit is y=1.4x+7.6. Here,x is the number of month and y is the weight in pounds. To determine the weight at one year visit, use x=12. y=1.4(12)+7.6 = 24.4 The weight at one year visit is 24.4 lbs

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