Question

Does anyone know about Functions or the Function Rule? If so I need help...

Answer 1

Well, one function rule is that it must pass the vertical line test and have one y value for every x value

Answer 2

but i have notes and everything but i have no clue on how to solve any of the functions.!
Example:\[(3,2) (3,8) (-2,-3) (0,7) (-1,5) (-4,2) (-3,7)\] how am i suppost to know if its a function or not?

Answer 3

You know if a set of coordinates is a function if there are NO repeating x values
You know if a function is 1-1 if there are no repeating x or y values
So for this example, this is not a function because there are two given values for 3: (3,2) and (3,8)

Answer 4

So are you saying there has to be atleast 1 same Input or Output? if i were to make it in to a input, output table... Sorry i just dont get Functions at all....

Answer 5

Its hard to explain because I dont uderstand...

Answer 6

Yea, I think I get what us saying so if u did make a table there could could only be one x value for every y... for example if the input values of: 1,2,3 and the outputs 4,5,6 that would be a function because each x value and one y value; no repeating x values

If that makes sense...

Answer 7

So there cant be no repeating number in the x value? Would that be a funtion or not a function?

Answer 8

Sorry for the late reply... Yea no repeating x values = function :)