# Algebra - Aptitude Questions and Answers

 What is the equation of the line which passes through the points (2, 3) and (- 4, 1)? A) x - 3y = - 7 B) x + 3y = 7 C) x - 3y = 7 D) x + 3y = - 7 Correct Answer : x - 3y = - 7 Explanation :Let (2, 3) is (x1, y1) and (-4, 1) is (x2, y2) The equation of a line passing through two points (x1, y1) and (x2, y2) is given by y - y1 = m(x - x1) , m is the slope there, m = (y2 - y1)/(x2 - x1) = (1-3)/(-4-2) = -2/-6 = 1/3 Then the equation is: y - 3 = (1/3)*(x-2) 3y - 9 = x - 2 3y - x = 7 x - 3y = - 7 Post/View Answer Post comment Cancel Thanks for your comment.! Write a comment(Click here) ...
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