Answer:
B. f(x) = Ixl
Explanation:
You want to identify the absolute value parent function.
Absolute value
The absolute value of an expression is indicated by bracketing it with vertical bars.
f(x) = |x| . . . . . . . the absolute value of x
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Additional comment
The "parent" function is the basic unadorned function, not translated or scaled in any way.
x² is the parent quadratic function
2^x is a parent exponential function with a base of 2. Perhaps the real "parent" exponential function is e^x. (Either can be written by scaling the other.)
x is a parent linear function
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