x=y^2
is that a function?
2007-01-03 14:11:15 · 4 answers · asked by portlanddancer 2 in Education & Reference ➔ Homework Help
Yes, it's a function. Don't listen to zzfan; the definition of a function is not "that every y value can only be used once," it is that there can only be one y value for any given x value. Neither an x value of 2 nor -2 has a y value of 4, and they don't have the same y value at all; x=-2 has an undefined y value, and x=2 equals the square root of 2. In fact, the function can be simplified as y = the square root of x
2007-01-03 14:40:40 · answer #1 · answered by Geoffrey F 4 · 0⤊ 1⤋
Yes, it is a function because t goes through the graph twice...
2007-01-03 22:30:54 · answer #2 · answered by Kristine 2 · 0⤊ 1⤋
yes it is. good luck.
2007-01-03 23:15:48 · answer #3 · answered by OMG 3 · 0⤊ 1⤋
yes it is.
2007-01-03 22:13:42 · answer #4 · answered by kemchan2 4 · 0⤊ 1⤋