I don't understand why x=-2 IS NOT a function and y=2 is a function. I need help ASAP! THANKS!!!
2007-11-28 14:57:44 · 4 answers · asked by Kayla 2 in Education & Reference ➔ Homework Help
Definition of function:
For each value of x there is only one value of y.
In the first one while x is -2, y could be -40, 0, 7, or 100,000 so there is more than one value of y.
In the second one for any and all values of x, y can only be 2.
2007-11-28 15:05:54 · answer #1 · answered by Tim C 7 · 0⤊ 0⤋
x=-2 is not a function because it has no slope and no y-intercept. It is a vertical line that does not cross the y-axis.
y=2 is a function because it crosses the y-axis at y=2. It has a slope of 0.
2007-11-28 23:04:02 · answer #2 · answered by purple_heart0128 3 · 0⤊ 0⤋
If there are more than one y values for the same x value it is not a function, basically if a line is drawn vertically on a graph it should only intersect an equation once.
2007-11-28 23:01:43 · answer #3 · answered by Daniel G 4 · 0⤊ 0⤋
You left out some information. We don't have your book to be able to read the entire question. You have to tell us before we can tell you.pp
2007-11-28 23:01:22 · answer #4 · answered by ttpawpaw 7 · 0⤊ 0⤋