The lower line has a slope of 0.6 and passes through (0,0). Its equation is $y = 0.6x$. The upper line has a slope of -0.3 and passes through (5, 3). Using point-slope form, the equation is $y - 3 = -0.3(x - 5)$, which simplifies to $y = -0.3x + 4.5$.
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