What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of 1/3.

A. 3x - y - 7 = 0
B. x - 3y + 7 = 0
C. x - 3y - 7 = 0

Question

What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of 1/3.


A. 3x - y - 7 = 0
B. x - 3y + 7 = 0
C. x - 3y - 7 = 0

anonymous · Answer

The firs thing to do is to set all of the equations into y=mx+b form

anonymous · Answer

u mean gradient as slope right =), so troll

anonymous · Answer

y=3x+7
y=1/3x +7/3
y=1/3x+7/3

anonymous · Answer

We can see that only two of the answers have a 1/3 slope, so the first choice can be eliminated.

anonymous · Answer

kirby, u sure plus?

anonymous · Answer

Wait hold on, the last choice is y=1/3x-7/3

anonymous · Answer

Then plug 1 and -2 in to see which one equals itself

anonymous · Answer

is C , why 1/3+7/3=-2 one? lol so troll, i must really take my hat off for u if i have a hat, wait here, imma gonna buy one, just saying

mathmale · Answer

Why not use the point-slope formula for a straight line?  It's by far the most straightforward approach.  Here it is:  y-b = m(x-1), where (a,b) is the point in question and m is the slope.