Question 242832
The general form of the equation is given:
{{{I = mx + b}}}
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This is in the standard slope-intercept form:  y = mx + b 
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The constant 'b' is the base salary:  18500
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And she gets 12% of sales.  The slope 'm' is 12% or 0.12, where x is the dollar value of sales.
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I is income
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{{{I = .12x + 18500}}}