Which of the following guarantees a mapping will not be a function?

An x value has two or more arrows leaving it

A y value has two or more arrows arriving at it

Which of the following best describes a function?

A special relationship where each x value has only one y value

A special relationship where each x and y are individually paired

A special relationship where each y value has only one x value

A special relationship where each the x and y value and always equal

How do you administer a vertical line test.

Draw lines straight down your graph and see if any hit the graph more than once

You don't only doctor's are allowed to do those

Draw lines straight across your graph and see if any hit the graph more than once

Check to see if the graph is a vertical line( straight up)

Function vs Non Function

Quiz

•

Mathematics

•

8th Grade

•

Practice Problem

•

Medium

•

CCSS

8.F.A.1, HSF.IF.A.1, HSF.IF.A.2

+1

Standards-aligned

Kathleen Cipolla

Used 463+ times

FREE Resource

About this resource

This quiz focuses on functions and relations in mathematics, specifically targeting the fundamental concept of identifying whether a given relationship qualifies as a function. Designed for 8th grade students, the content emphasizes the critical understanding that a function is a special type of relation where each input (x-value) corresponds to exactly one output (y-value). Students must master the ability to analyze functions across multiple representations: graphs, mappings, tables, and sets of ordered pairs. The core concepts include applying the vertical line test to graphs, recognizing that repeated x-values with different y-values violate the function definition, understanding domain and range terminology, and evaluating simple linear functions. Students need strong analytical reasoning skills to examine various representations and determine whether the one-to-one input-output relationship is maintained, as well as the ability to articulate their mathematical reasoning by identifying specific violations of the function definition. Created by Kathleen Cipolla, a Mathematics teacher in the US who teaches grade 8. This comprehensive assessment serves multiple instructional purposes throughout the function unit, working effectively as a formative assessment tool to gauge student understanding before moving to more complex function operations. Teachers can deploy this quiz as a warm-up activity to activate prior knowledge, assign it as homework to reinforce classroom learning, or use it as a review session before summative assessments. The varied question formats mirror different ways students encounter functions in their coursework, ensuring they can transfer their understanding across multiple contexts. This quiz directly supports 8.F.A.1, which requires students to understand that a function assigns exactly one output to each input, and connects to F-IF.A.1 at the high school level by building foundational understanding of function notation and evaluation.

19 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Is this graph a function and how can you tell?

Yes its a function cause it doesn't cross itself

No it's not a function because it goes through the origin

No it's not a function because the x value 4 has y values of -2 & 2

No it's not a function because the y value 4 has x values of -2 & 2

Tags

CCSS.HSF.IF.A.1

CCSS.HSF.IF.A.2

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Is this mapping a function and how can you tell?

Yes its a function cause all the numbers have lines

No it's not a function because there a 5 in both ovals

No it's not a function because the x value 5 has y values of 2 & 9

No it's not a function because the y value 5 has x values of 2 & 9

Tags

CCSS.8.F.A.1

3.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Is this table a function and how can you tell?

Yes its a function because there are not variables for missing numbers

No it's not a function because the numbers don't follow any pattern

No it isn't a function because the x value 4 has y values of 7& 14

No it's not a function because the y value 4 has x values of 7& 14

Tags

CCSS.8.F.A.1

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is this set of ordered pairs a function and how can you tell?

Yes its a function because no y values repeat

No it's not a function because there are negative numbers

No it isn't a function because an x value repeats but has different y values

No it isn't a function because an y value repeats but has different x values

Tags

CCSS.8.F.A.1

5.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Which of the following guarantees a table will not be a function?

A x value repeats

An y value repeats

An x value repeats and has different y values

A y value repeats and has different x values

Tags

CCSS.8.F.A.1

6.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Which of the following guarantees a set of ordered pairs will not be a function?

An x value repeats

A y value repeats

An x value repeats and has different y values

A y value repeats and has different x values

Tags

CCSS.8.F.A.1

7.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Which of the following guarantees a table will not be a function?

An x value repeats

A y value repeats

An x value repeats and has different y values

A y value repeats and has different x values

Tags

CCSS.8.F.A.1

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