Khan/khan-exercises — Issue #11882: Point slope form - The Answere Doens't make sence
Author: KhanBugz
Created: 2012-01-23 03:08:13+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

(x) is just a fancy term for y. So one point is (5,−2).

The formula to find the slope is: m=(y1−y2)/(x1−x2).

So, by plugging in the numbers, we get −2−25−−5 =−25

Select one of the points to substitute for x1 and y1 in the point slope formula. The solution is then either:

(y−−2)=−25(x−5)

OR

(y−2)=−25(x−−5)

I don't know how you got -2/5

[point_slope_form.html?seed=145&problem=y-as-function-of-x](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=145&problem=y-as-function-of-x&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=145&problem=y-as-function-of-x&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-2%5C%22%2C%5C%22%5C%22%2C%5C%22%5C%22%5D%5D%22%2C65%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

[[["-2","",""]]]

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