Question

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







A.

y = x2








B.

y = 3x








C.

x2 - y2 = 1








D.

y2 = x2

Answer 1

i think a and c

Answer 2

a & b

Answer 3

thanks loli got 1 right

Answer 4

c & d are not functions.

Answer 5

yes

Answer 6

@ankolix A function is a realtion that maps each element of its domain to a single element of its range. A parabola that opens up or down is a function. A parabola that opens right or left is not a function.