Matthew claims y=square root of x is a function of x when x is greater than or equal to zero. Penny disagrees and offers this counterexample: when x=4, can be 2 or -2. Is Penny correct?
A.
Penny presented a valid counterexample, and she is correct that y= square root of x is NOT a function of x.
B.
Penny presented a flawed counterexample, but she is correct that y= square root of x is NOT a function of x.
C.
Penny is wrong; y=square root of x is a function of x.
D.
There is not enough information to answer this question.
1 answer
A. Penny presented a valid counterexample, and she is correct that y= square root of x is NOT a function of x.
1 answer