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

Question

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 · Answer

@Schen421

anonymous · Answer

@Loser66

anonymous · Answer

I am thinking that it may be A

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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 · Answer

So it is A?

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

do you understand it @Vocaloid ?

vocaloid · Answer

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

anonymous · Answer

it will move the parabola 1 unit to the right ?

anonymous · Answer

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

anonymous · Answer

but i dont the option oO

anonymous · Answer

see*

anonymous · Answer

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 · Answer

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

vocaloid · Answer

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

anonymous · Answer

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

vocaloid · Answer

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

anonymous · Answer

f(x-1)=x^2

vocaloid · Answer

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

anonymous · Answer

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

vocaloid · Answer

almost, you're forgetting the parentheses

anonymous · Answer

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

vocaloid · Answer

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

anonymous · Answer

x^2-2x+1

anonymous · Answer

that would make it B?!

vocaloid · Answer

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 · Answer

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

vocaloid · Answer

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

anonymous · Answer

-2x+1

vocaloid · Answer

right! so which answer do you think it is?

anonymous · Answer

C

vocaloid · Answer

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

anonymous · Answer

I mean A!!

vocaloid · Answer

great! you got it!!!