breexj

18.05.2021 • 

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) On the line below, write the least squares regression equation that models the data. Let x = time in years since 1900 and let y = minimum hourly wage. Use Desmos, and do not round the equation it gives you.

(b) Use the equation to estimate the minimum hourly wage of a U.S. worker in 2025. Use Desmos and round to the nearest cent.
Minimum hourly wage =
Include “Snips” or screenshots showing everything you typed into Desmos.

2The table shows the soil density of several soil samples at different depths.

Depth (m) 1 5 6 8 10 12 14 21 23 24 28
Soil density ( )
1045 1063 1102 1140 1191 1232 1249 1254 1265 1268 1273

(a) On the line below, write the quadratic regression equation that models the data. Let x = depth below the surface and let y = soil density. Use Desmos, and do not round the equation it gives you.

(b) Use the equation to estimate the soil density of a sample at a depth of 20 m. Use Desmos, and round the density to the nearest whole number.
Soil density =
¬¬¬¬¬¬
Include “Snips” or screenshots showing everything you typed into Desmos

Ответ:

pimuang50

18.06.2021

Mathematics

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Table 1:

(A) The equation is y = 0.15x - 2.65

(B) By the graph, the estimated minimum hourly wage of a U.S. worker in 2025 will be $4.4.

x = (2025 - 1978) = 47.

y = 0.15 * 47 - 2.65

y = 7.05 - 2.65

y = 4.4

Table 2:

(A) y = -0.4931x² + 23.3798x + 996.0289

(B) x = 20

y = -0.4931x² + 23.3798x + 996.0289

y = -0.4931(20)² + 23.3798(20) + 996.0289

y = -0.4931(400) + 467.596 + 996.0289

y = -197.24 + 467.596 + 996.0289

y = 1266.3849

Step-by-step explanation:

Please mark as brainliest if this helps! (:

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Ответ:

bunn95

30.06.2022

Mathematics

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Idk

Step-by-step explanation:

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