1. What is the equation of the line whose yintercept is 4 and making an angle of 45° with the positive xaxis?
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By: anil on 05 May 2019 02.14 am
Slope of line making an angle $$ heta$$ with positive x-axis = $$tan( heta)$$ => Slope of given line, $$m = tan(45) = 1$$ and y-intercept, $$c = 4$$ Equation of line = $$y = mx + c$$ => $$y = 1(x) + 4$$ => $$x-y=-4$$ => Ans - (D)
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