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If a line has slope 3 and pass through point (1, 2) then the equation of line is _________(a) x=3y-1(b) x=3y+1(c) y=3x+1(d) y=3x-1I had been asked this question during an interview for a job.This question is from General Equation of a Line in section Straight Lines of Mathematics – Class 11

Answer»

Right option is (d) y=3x-1

To EXPLAIN I would say: LET general EQUATION of line be y=m*x + c.

Given m=3 => y=3x+c

Substituting the point (1, 2) in above equation we get 2=3*1 + c => c = -1

So, equation of line will be y = 3x-1.



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