write an equation for the line that passes through (1,-1) and (0, -4)

Write an equation for the line that passes through (1, -1) and (0, -4)
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The slope of the line is the difference of the y values divided by the difference of the x values: (-4-(-1))/(0-1)=-3/(-1)=3. Equation of a line in general terms is y=ax+b, where a is the slope and b the y intercept. The y intercept is when x=0, and one of the points (0,-4) has x=0, so b=-4. The line is y=3x-4.

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-4-(-1)/(0-1)
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