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Mathematics 16 Online
mikewwe13:

Which function represents the graph of f(x) = −4|x| after it is translated 3 units down? A. g(x)=−4|x| + 3 B. g(x)=−4|x| − 3 C. g(x)=−4|x−3| D. g(x)=−4|x+3|

Vocaloid:

hint: to translate f(x) = |x| down h units, simply subtract h from the function to get f(x) = |x| - h make sure the subtraction sign is outside the absolute value sign

Vocaloid:

now apply this logic to your own problem

mikewwe13:

the answer is C

Vocaloid:

again, make sure the subtraction sign is OUTSIDE the absolute value symbols

mikewwe13:

i just worked out the problem and i come to the conclusion that c isn't and so one of the answers are

Vocaloid:

so what do you think the answer might be?

mikewwe13:

correct me if i'm wrong, but i think the answer is b ?

Vocaloid:

yup b is correct, good work

mikewwe13:

The graph of g(x) is obtained by reflecting the graph of f(x)=2|x| over the x-axis. Which equation describes g(x)? A. g(x) = |x+2| B. g(x)=− |2x| C. g(x) = |2x| D. g(x)= − |x+2|

Vocaloid:

to reflect over the x-axis, multiply the entire function by -1

Vocaloid:

so in this case the negative sign would be outside the absolute value sign

mikewwe13:

correct me if i'm wrong, the answer is D ?

Vocaloid:

leave the 2|x| alone and just write a negative sign in front of it

mikewwe13:

B because i solve it multiplying it

Vocaloid:

hm. looking at these answer choices technically none are right, but B is the best answer

mikewwe13:

What type of transformation takes the graph of f(x)= |x| to the graph of g(x) = |4+x|? A. vertical translation of 4 units down B. horizontal translation of 4 units left C. vertical translation of 4 units up D. horizontal translation of 4 units right

Vocaloid:

for horizontal transformations, f(x+h) is a shift to the left by h units

Vocaloid:

try applying this logic to your problem

mikewwe13:

the answer is D ?

Vocaloid:

f(x+h) is a shift to the <<left>> by h units

Vocaloid:

so |x+4| is a shift to the ____ by 4 units fill in the blank

mikewwe13:

left

Vocaloid:

good so which answer matches?

mikewwe13:

B.

Vocaloid:

good job

mikewwe13:

thanks a lot

mikewwe13:

a whole lot

mikewwe13:

if i ever need you, i come to you right ?

Vocaloid:

sure

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