Functions Vocabulary

All About Functions

100

What is the definition of a function?

a rule that assigns each input (x-value) exactly one output (y-value); represented by graphs, tables, and ordered pairs

200

How would I say: f(x)

"F of x"

300

Can I represent a function as a table?

Yes, you can represent a function as a table.

X and Y

100

Does x represent the input or the output?

The input.

200

Does y represent the input or the output?

The output.

300

In which order are x and y in an ordered pair?

(x, y)

Is it a Function?

100

Does passing the vertical line test mean that the graph is a function? Yes or no?

Yes.

200

I did the vertical line test and one of my vertical lines passed through the graph three times. Is the graph a function?

No, the graph is not a function.

300

In a table of x and y values, there are three -2s with three different outputs. Is the table a function?

No, the table is not a function.

Linear vs. Non-Linear

100

True or false: a linear function is a straight line.

True.

200

I see a graph of a function that looks like a "u." Is the graph linear or non-linear?

Non-linear.

300

True or false: A non-linear function CAN be a straight line.

False.