Asked by Jamie
Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and?
reflected over the x-axis?
a. f(x)=1/3x^2
b. f(x)= -3x^2
c. f(x)= -1/x^2 +3
d. f(x)= -1/3 x^2
reflected over the x-axis?
a. f(x)=1/3x^2
b. f(x)= -3x^2
c. f(x)= -1/x^2 +3
d. f(x)= -1/3 x^2
Answers
Answered by
Reiny
perform your transformation on an arbitrary point.
e.g. (2,4) is on the original graph
so a vertical expansion by a factor of 3 would make it
(2,4) ----> (2,12)
then reflect that in the x-axis
(2,12) ----> (2,-12)
now which of your choices would yield that result?
e.g. (2,4) is on the original graph
so a vertical expansion by a factor of 3 would make it
(2,4) ----> (2,12)
then reflect that in the x-axis
(2,12) ----> (2,-12)
now which of your choices would yield that result?
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