Use the LinReg command to find the line of best fit for (Data set #11) and report the equation of the line along with the TI commands used. Report the explanatory and response variable in terms of your data.

838 II 9 C} lead versus zlna ll'l "Sh Excel File Spokane River, WA TexlFile 140 Minilab File 3 mo 3 About the Data & 3 View the Data 2 'i 50 3 y with Using Data 20 1 l 1 1 U 5 1.5 2 5 3 5 45 lead (ppm) Go to Top. 3 About the Data Rainbow trout, mountain Whitesh and largescale suckers taken from 4 different localities along the Spokane River (eastern Washington) during July, August and October of 1999 were analyzed for three heavy metals (lead, zinc and cadmium) by Manchester Laboratory for the Washington State Department of Ecology. Mo st of the analyses were done on lets (the part typically consumed by humans), however a few whole specimens were tested as well. Metal contents are reported in milligrams of metal per kilogram of sh (mg/kg), which is an equivalent unit to parts per million (ppm). A couple of redundant analyses indicate crude uncertainties in reproducibility of at least 14 ppm for zinc, .07 ppm for lead, and .01 ppm for cadmium. The source of the heavy metals is upstream from Spokane in the Coeur d'Alene mining district of northern Idaho, one of the richest mining districts in the US and also one of the most heavily contaminated. Acid mine drainage directly from shafts and adits, and from leaching of metal rich mine tailings (waste rock), as well as metalrich discharges from smelters, have contaminated many streams, rivers and lakes in the Spokane/Coeur d'Alene watershed. Metals are both dissolved in the river water and found as minute particles, and can enter the food web at various stages. The graph shows a strong positive linear correlation between lead and zinc content in whole sh, regardless of fish type. One could use this relationship to predict the zinc content of a sh based on its lead content, thereby increasing the efciency of the analytical program; you only have to analyze for lead. Does this relationship support the contention that sh in the Spokane River are contaminated in the same way from the same source? Reference: Johnson, A. (2000), Results from Analyzing Metals in 1999 Spokane River Fish and Craysh Samples; Washington State Dept. of Ecology report. h_ttp:/'/www.ecy.wa.gov/bib1io/0003017.htm1 Go to Top, 0 View the Data Metal Cnncenlralinns in 1999 Spokane River Fish Samples concentrations in parts per million (ppm) Source: WA State Dept. ofEeology report Fish Type and Sample Type: Lead Zinc Rainbow Tmul Whole: 0.73 45.3 1.14 50.8 0.60 40.2 1.59 64.0 Largescale Sucker Whole: 4.34 150.0 1.98 106.0 3.12 90.8 1.80 58.8 Mountain Whitesh Whole: 0.65 35.4 0.56 28.4 0 seattlecentral.edu