Question

Is [1,4],[1,5],[1,6],[1,6],[1,7] a function????

Answer 1

Draw a graph that helps and then do the vertical line test.


I think this will give you a line going throught the x-axis at 1. It won't pass the vertical line test which says you should be able to draw a vertical line at any place through the graph.

Answer 2

I don't get it!!!

Answer 3

Maybe you haven't learned the vertical line test.

Each x - value can be related to one and only one y - value. Since the x is associated with several different y-values then it is not a function.

However, it is okay for two different x - values be associated with the same y-value.

(2, 3 ) and (4, 3) and (7, 3) would be a function.

Answer 4

So, it's not a function??

Answer 5

It is not a function.

Answer 6

Thank you sooooooooooooooo much Dr. Jane, but I still don't understand it 100%

Answer 7

Functions are hard to understand. If you can make graphs, they are easier to see.

A circle isn't a function based on my explanations, but a half- circle can be.

y = x^2 is a function and x =y^2 is not.

Any straight linelike y = 2x+3 is a function.

x = 5 is not a function

y = 5 is a function.

If you can graph these, you may see the pattern.

Answer 8

If for a single value of x, you have two or more values of y, it is not a function
Here you have four values of y for x = 1