Justifying an Argument
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Alissa is analyzing an exponential growth function that
has been reflected across the y-axis. She states that the
domain of the reflected function will change because the
input values will be the opposite sign from the reflected
function. Simon disagrees with Alissa. He states that if an
exponential function is reflected across the y-axis, the
domain will still be all real numbers
Which student is correct and why?
Alissa is correct because the domain will change
from negative to positive x-values
Alissa is correct because a reflection across the y-
axis will change the possible input values of the
reflected function
Simon is correct because even though the input
values are opposite in the reflected function, any
real number can be an input
Neither student is correct.