Question

Which graph represents a function?

Which statement explains why your graph from Question 4 is a function?
Question 5 options:


Each y value pairs to any x value.


It is the graph of a linear equation.


Each x value pairs to one and only one y value.


The solutions to the equation can be written as ordered pairs.

Answer 1

Part 1:

The final graph with upward parabola represent a function because only this curve passes the Vertical Line Test.

Part 2:

Each x value pairs to one and only one y value.

To check whether a graph is function or not we use Vertical Line Test which draws a vertical line. A function must have one output y for each unique value of x.