Steve S. answered 03/27/14
Tutor
5
(3)
Tutoring in Precalculus, Trig, and Differential Calculus
“Which of the following are point-slope equations
of the line going through (3, 6) and (1, 2)?”
(x1,y1) = (3, 6), (x2,y2) = (1, 2)
slope, m = (y1 - y2)/(x1 - x2)
m = (6 - 2)/(3 - 1) = 4/2 = 2
So valid point-slope equations would be:
y - 6 = 2 ( x - 3) or y - 2 = 2 ( x - 1)
neither of which is listed in the “Answers”.
IS THE QUESTION POSED CORRECTLY?
(x1,y1) = (3, 6), (x2,y2) = (1, 2)
slope, m = (y1 - y2)/(x1 - x2)
m = (6 - 2)/(3 - 1) = 4/2 = 2
So valid point-slope equations would be:
y - 6 = 2 ( x - 3) or y - 2 = 2 ( x - 1)
neither of which is listed in the “Answers”.
IS THE QUESTION POSED CORRECTLY?
(x + 6)
(x - 1)