Lily E.
asked 04/13/20Writing Linear Functions
A student writes the equation for a line that has a slope of -6 and passes through the point (2, –8).
y -(-8) = -6(x - 2)
y -(-8) = -6x + 12
y -(-8) + 8 = -6x + 12 + 8
y = -6x + 20
Explain why the work is not correct.
1 Expert Answer
John B. answered 04/14/20
Former math teacher and tutor for ACT Math.
Simplify the second line to say y + 8 = -6x + 12, then the third line should read y + 8 -8 = -6x +12 -8 etc.
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Kaitlyn T.
This student messed up on the first step, when you see -(-8) you should know that that is going to turn into a poitive because two negatives cancel eachother out, what you should have got on that first step is y+8=-6(x-2) then next you would have y+8=-6x+12, next you need to subtract the 8 from the 12 giving you your final equation y=-6x+4. Hope that helped!12/10/20