Functions

Front

What is the definition of a function?

Back

A function is a relation where every input has only ONE output (no x repeats).

Front

Is this graph a function or not a function?

Back

Not a Function.

Front

Is the relation a function? Why?

Back

No, because the x-value 11 has two y-values paired with it.

Front

Which equation is proportional?

Back

y=1/2 x.

Front

Which graph is proportional?

Back

GRAPH 2.

Front

What is the domain of a function?

Back

The set of all possible input values (x-values) for the function.

Front

What is the range of a function?

Back

The set of all possible output values (y-values) for the function.

Front

What does it mean for a function to be linear?

Back

A linear function creates a straight line when graphed and has the form y = mx + b.

Front

What is a proportional relationship?

Back

A relationship where the ratio of y to x is constant, represented by a straight line through the origin.

Front

What is the vertical line test?

Back

A method to determine if a graph represents a function; if a vertical line crosses the graph more than once, it is not a function.