\"slope\"\"

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Since the line is raising the slope is positive.

\

Next, find the slope.

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\"\"            

\

Substitute  4 for y2,1 for y1, 0 for x2, and 5 for x1 in slope formula.

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\"\"              (Simplify) \ \

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\"\"              (Subtract: \"\")

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\"\"                (Additive identity property: \"\")   

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\"\"                (Simplify) \"\"

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Slope is negative and slope is \"\".