How do you determine if a mapping, table, or set of ordered pairs represents a function?
A-all x values are different
B-some x values repeat
C-some y values repeat
D-all y values are different
I really have no clue what it is.
You can only have one value of y for each value of x
if x values were to repeat, they would have to have the same y value, which would be kind of unnecessary and meaningless.
so would it be d?
I think the x values should be different :)
No, a parabola, for example y = x^2 is a function. There is one and only one value of y for every x
y s the same , +1 , for x = -1 and for x = +1
Thank you sooo much!
you cannot have the same x value twice. For example,
(2,3) and (2,4)
How can f(2) be 4 , if f(2) = 3?
if you had x = 0, y = 5
and also
x = 0, y = 7
that would NOT be a function