Understanding Functions

What is the output of the function f(x) = x + 3 when the input is 0?

• 6

• 3

• 0

• 9

In a function, what is the relationship between inputs and outputs?

• Outputs determine the inputs

• Each input can have multiple outputs

• Each input has exactly one output

• Inputs and outputs are unrelated

Which of the following is NOT a function?

• All inputs have the same output

• An input has multiple outputs

• Different inputs can have the same output

• Each input has a unique output

What does it mean if two different inputs have the same output in a function?

• The function is quadratic

• The function is linear

• The function is still valid

• The function is invalid

What does the vertical line test determine?

• If a graph is increasing

• If a graph is a function

• If a graph is linear

• If a graph is symmetrical

In a mapping diagram, what indicates that a relation is not a function?

• Arrows crossing each other

• No arrows at all

• Multiple arrows to one output

• Multiple arrows from one input

If a graph fails the vertical line test, what does it indicate?

• The graph is linear

• The graph is not a function

• The graph is a function

• The graph is quadratic

What is the domain of a function?

• The highest output value

• All possible inputs

• The lowest input value

• All possible outputs

What is the range of a function?

• All possible outputs

• The lowest output value

• All possible inputs

• The highest input value

When determining the domain and range, what should you consider for word problems?

• Only positive numbers

• Only whole numbers

• Only negative numbers

• Only decimal numbers