math
posted by mike .
Which equation does not represent y as a function of x?
A. 7y = 2
B. 6x = 8y
C. 5y^2 + 2x = 4
D. 4x^2 + 9y = 8

Look at C. Is there one y for each x?
posted by mike .
Which equation does not represent y as a function of x?
A. 7y = 2
B. 6x = 8y
C. 5y^2 + 2x = 4
D. 4x^2 + 9y = 8
Look at C. Is there one y for each x?