Which equation does not represent a function? a) y = x + 5 b) y = x^2 + 3 c)y^2 = x + 4

1 Answer
May 5, 2018

#c)#

Explanation:

.

#y=x+5#

This is a function because for each value of #x# we have one value of #y#.

#y=x^2+3#

This is a function because for each value of #x# we have one value of #y#.

#y^2=x+4#

This is not a function because for each value of #x# we have more than one value of #y#. For example,

#x=5, :. y^2=5+4=9, :. y=sqrt9=+-3#