Posted by Anonymous on .
If point A is (2,4) and point B is (3,2) and slope is -2 what would the equation be in standard form?
Having trouble with this problem!
Once again, the same kind of question as before.
step1: find slope
(you did that correctly and got m = -2)
use y-y1 = m(x-x1) , where (x1, y1) is either of the given points
y-4 = -2(x-2)
y-4 = -2x + 4
standard form has both x and y terms on the left, the constant on the right.
2x + y = 8
(using (3,2) has to give you the same equation, try it.)
I usually use the point not used to sub in my equation, to see if it satisfies the equation.
Let me see if I remember this... I believe you plug in one of the points into the point slope formula
(2,4) x1=2 and y1=4 m=slope in this case -2
I hope this help