Khan/khan-exercises — Issue #5321: Converting between slope intercept and standard form - False Errors in excersise "Converting between slope intercept and standard form"
Author: KhanBugz
Created: 2011-11-01 06:46:25+00:00
State: open
Labels: firefox

In an excersise with the description (including hints for clarity):

Convert the following equation from slope intercept form to standard form.

In other words, if the equation is rewritten to look like Ax+By=C, what are the values of A, B, and C?

y=x−2

Move the x term to the same side as the y term.

−x+y=−2

Inspecting the equation in standard form, we see the following.

A = −1
B = 1
C = −2

The following answer is deemed as incorrect even though it's also a valid solution:

A = 1
B = -1
C = 2

I.e. every term multiplied by -1.
If not you need to reformulate the question to state that you're looking for the solution where B is greater or equal to zero.

[converting_between_slope_intercept_and_standard_form.html?seed=40&problem=slope-to-standard](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/converting_between_slope_intercept_and_standard_form.html?seed=40&problem=slope-to-standard&debug)

[["1","-1","2"]]

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