SOLUTION: Hi. I need some help checking this problem. Find the through of a. the vertical line through (-1,7) b. the line containing (-2,6) and (4,0) thanks H.C.

Algebra ->  Equations -> SOLUTION: Hi. I need some help checking this problem. Find the through of a. the vertical line through (-1,7) b. the line containing (-2,6) and (4,0) thanks H.C.       Log On


   

Question 180591: Hi.
I need some help checking this problem.
Find the through of
a. the vertical line through (-1,7)
b. the line containing (-2,6) and (4,0)
thanks
H.C.
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
I need some help checking this problem.
Find the through of
a. the vertical line through (-1,7)
b. the line containing (-2,6) and (4,0)
:
a) remember vertical lines take the form of x=a and x is a for all values of y
so we know the x value of the point (-1,7) is -1 and remember it is -1 for ALL values of y
:
our equation is highlight%28x=-1%29
:
b)(-2,6) and (4,0)
:
first thing we have to do is find the slope:DELTA%28y%29%2FDELTA%28x%29
:
(0-6)/(4-(-2))=6/6=1
:
so our slope is m=1. now we have to use the point slope formula to find our equation: y-k=m(x-h).....where m is the slope and (h,) is ANY point on the line
:
so lets choose ONE of our points I will use (4,0)
:
y-0=1(x-4)
:
highlight%28y=x-4%29