Knowledge Check: Functions Lesson Slides

2 Slides • 5 Questions

1

The vertical line test is a visual method used to determine whether
a relation represented as a graph is a function. To apply the vertical line test, consider all of the vertical lines that could be drawn on the graph of a relation. If any of the vertical lines intersect the graph of the relation at more than one point, then the relation is not a function.

Is a graph a function?

2

Things that can be counted
Contains whole numbers only.
Graph contains dots
Examples: purchasing tickets, # of students, # of text messages, etc.

Discrete

Things that are measured
Contains whole numbers, decimals, and fractions
Graph contains a line
Examples: time, temperature, weight, distance, etc.

Continuous

3

Multiple Choice

Review graphs a and b.

Which graph is a function?

1

Neither

2

Both

3

b

4

a

4

Multiple Choice

Review graphs a and b.

Which graph is a NOT function?

1

Neither

2

Both

3

b

4

a

5

Multiple Choice

Are the graphs discrete or continuous?

1

Discrete

2

Continuous

3

Neither

4

Both

6

Open Ended

Review the graphs.

Which is a function and which is NOT a function. Explain your reasoning.

Type response here

7

Open Ended

Are these graphs discrete or continuous?

Type response here

The vertical line test is a visual method used to determine whether
a relation represented as a graph is a function. To apply the vertical line test, consider all of the vertical lines that could be drawn on the graph of a relation. If any of the vertical lines intersect the graph of the relation at more than one point, then the relation is not a function.

Is a graph a function?

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