Question

Which of these equations represent functions? Check all that apply.







A.

3x2 - y2 = 1








B.

y = x2 - 2








C.

y = 6x








D.

y2 = x2

Answer 1

B and C for the same reasons as before.

Answer 2

"A" is an ellipse and "D" is a big "X".

Answer 3

"B" is a parabola opening up and is a function. "C" is a slanted line and is a function.

Answer 4

Actually, "A" is a hyperbola but it is still not a function