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littlemoneyh
24.06.2021 •
Mathematics
1. The table shows the minimum wage rates for the United States during different years.
Year 1978 1979 1980 1990 1991 1996 1997 2007 2008 2009
Minimum hourly wage 2.65 2.90 3.35 3.80 4.25 4.75 5.15 5.85 6.55 7.25
(a) Write the least squares regression equation that models the data. Let x = time in years since 1900 and let y = minimum hourly wage.
(b) Use the equation to estimate the minimum hourly wage of a U.S. worker in 2025. Show your work.
PLS ANSWER CORRECTLY WITH AN EXPLANATION
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Ответ:
y = 0.126X - 7.119
8.63
Step-by-step explanation:
X = year, we subtract the year in the data from 1900 ;
So for the years we have :
78,79,80,90,91,96,97,107,108,109
Using technology to fit the data above, the regression model obtained is ;
y = 0.126X - 7.119
Where x = years
y = minimum hourly wage
The minimum hourly wage in 2025
Year = x = 2025 - 1900 = 125 years
y = 0.126(125) - 7.119
y = 8.631
Predicted Minimum hourly wage = 8.63
Ответ:
x ≈ 10.9
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan38° =
=
( multiply both sides by 14 )
14 × tan38° = x , then
x ≈ 10.9 ( to the nearest tenth )