Representative data read from a plot on runoff sediment concentration for plots with varying amounts of grazing damage, measured by the percentage of bare ground in the plot, are given for steeply sloped plots. Steeply Sloped Plots Bare ground (%) 5 5 10 15 20 25 20 30 35 40 35 Concentration 90 225 270 540 450 450 810 720 990 1080 900 (a) Using the data for steeply sloped plots, find the equation of the least-squares line for predicting y runoff sediment concentration using x = percentage of bare ground. (Give the answer to two decimal places.) ŷ= (b) What would you predict runoff sediment concentration to be for a steeply sloped plot with 19% bare ground? (Round your answer to the nearest whole number.)

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