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Due to erosion, a river shoreline is losing several thousand pounds of soil each year. A linear equation that expresses the total amount of soil lost per year is y = 13,000x. What is the y-intercept, a? (Enter an exact number as an integer, fraction, or decimal.) a = Ibs Interpret its meaning. This means that 13,000 pounds of soil was lost before the first year began. O This means that there was no fixed amount of soil that was lost before erosion began. O This means that there was an amount of soil that was lost before erosion began. This means that 13 pounds of soil was lost before the first year began. This means that there was no fixed amount of soil that was lost before the year began. Additional Materials