MEDALS!!!! PLEASE HELP!!!!! PLEASE!!!! In the function f(x)=x^2.... How does a decrease of 1 in the independent variable x affect f(x)?
A. f(x) will have a change of 1-2x
B. f(x) will have a change of x^2-2x+1
C. f(x) will have a change of 2x+1
D. f(x) will have a change of x^2

- anonymous

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- anonymous

@Schen421

- anonymous

@Loser66

- anonymous

I am thinking that it may be A

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## More answers

- anonymous

I'm actually not sure what it's trying to ask, hold on.

- anonymous

what would happened if you decreased x by 1... i think

- anonymous

x^2 would be a parabola when graphed, if you were to minus 1 to x^2, then the y-intercept of the graph would shift down by 1 unit

- anonymous

So it is A?

- anonymous

Won't be able to give an answer, not too sure about this topic, sorry man!

- anonymous

Uhhhhhhh.... I have had 5 people try this question.... Hahahaha. This sucks

- anonymous

do you understand it @Vocaloid ?

- Vocaloid

ok, if x is decreased by one, x becomes (x-1)
what happens when you plug (x-1) back into f(x)?

- anonymous

it will move the parabola 1 unit to the right ?

- anonymous

I don't know.I really don't understand this

- anonymous

but i dont the option oO

- anonymous

see*

- anonymous

A. f(x) will have a change of 1-2x
B. f(x) will have a change of x^2-2x+1
C. f(x) will have a change of 2x+1
D. f(x) will have a change of x^2

- anonymous

OH IS IT D!?!?!? @Vocaloid

- Vocaloid

no... please do what I asked you to do...

- anonymous

f(x)-f=x^2 ???

- Vocaloid

no, please substitute (x-1) for x in the equation f(x)

- anonymous

f(x-1)=x^2

- Vocaloid

no, please check the right side of the equation
replace x with (x-1)

- anonymous

f(x-1)=x-1^2??

- Vocaloid

almost, you're forgetting the parentheses

- anonymous

f(x-1)=(x-1)^2

- Vocaloid

right! now, try expanding (x-1)^2

- anonymous

x^2-2x+1

- anonymous

that would make it B?!

- Vocaloid

great!
so, the original equation is f(x) = x^2
the new equation is f(x-1) = x^2 - 2x + 1
what CHANGED? what do f(x) and f(x-1) have in common? what is different?

- Vocaloid

Sorry, no, the answer is not B, please keep trying

- Vocaloid

What makes x^2 different than x^2 - 2x + 1
what part is different about the second equation?

- anonymous

-2x+1

- Vocaloid

right! so which answer do you think it is?

- anonymous

C

- Vocaloid

hint: -2x +1 = 1-2x

- anonymous

I mean A!!

- Vocaloid

great! you got it!!!

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