Lesson 15 - Understanding Functions

What is a function in mathematics?

• A relation where each input has multiple outputs.

• A relation where each input has exactly one output.

• A relation where each output has multiple inputs.

• A relation where inputs and outputs are not related.

Which of the following is a linear equation?

Which of the following is a non-linear equation?

Which of the following represents a function?

• A circle on a graph.

• A straight line on a graph.

• A vertical line on a graph.

• A horizontal line on a graph.

What is the standard form of a linear equation in two variables?

• 3

• 4

• -3

• 0

• -2

• 5

• 0

• -5

Which of the following is a characteristic of a non-linear equation?

• It forms a straight line on a graph.

• It has a constant rate of change.

• It can form a curve on a graph.

• It has no variables.

Which of the following is an example of a non-linear function?