Representing a Function Verbally and with Tables - Examples, Exercises and Solutions

Question Types:
Representations of Functions: Determine whether the table represents a functionRepresentations of Functions: Is the graph an example of a function?Representations of Functions: Creating a table from a verbal descriptionRepresentations of Functions: Sketch the Graph from a Verbal DescriptionRepresentations of Functions: Matching a graph to a functionRepresentations of Functions: Matching a graph to a tableRepresentations of Functions: Matching a table to a function

Function, describes a correlation or coincidence between a dependent variable (Y Y ) and an independent variable (X X ). The legitimacy of this relationship between the variables is called the " correspondence rule ".

Verbal representation of a function

The verbal representation of a function expresses the connection between variables verbally, i.e. through a story.

A typical verbal representation of a function can look like this:

  • Assuming that Daniel reads all the books he buys that month, the total number of books Daniel reads per year (Y Y ) is a function of the number of books Danny buys each month (X X ).

Tabular representation of a function

A tabular representation of a function is a demonstration of the legitimacy of a function using a table of values X X (independent variable) and the corresponding values Y Y (dependent variable).

In general, a table of values is shown as follows:

A1 - Verbal representation of a new function

Detailed explanation

Practice Representing a Function Verbally and with Tables

Question 1

Is the given graph a function?

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Question 2

Which of the following equations corresponds to the function represented in the graph?

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Question 3

Which of the following equations corresponds to the function represented in the table?

XY-3-1135246810

Question 4

Is the given graph a function?

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Question 5

Is the given graph a function?

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Examples with solutions for Representing a Function Verbally and with Tables

Exercise #1

Is the given graph a function?

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Video Solution

Step-by-Step Solution

It is important to remember that a function is an equation that assigns to each element in domain X one and only one element in range Y

Let's note that in the graph:

f(0)=2,f(0)=−2 f(0)=2,f(0)=-2

In other words, there are two values for the same number.

Therefore, the graph is not a function.

Answer

No

Exercise #2

Which of the following equations corresponds to the function represented in the graph?

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Video Solution

Step-by-Step Solution

Use the formula for finding slope:

m=y2−y1x2−x1 m=\frac{y_2-y_1}{x_2-x_1}

We take the points:

(0,−2),(−2,0) (0,-2),(-2,0)

m=−2−00−(−2)= m=\frac{-2-0}{0-(-2)}=

−20+2= \frac{-2}{0+2}=

−22=−1 \frac{-2}{2}=-1

We substitute the point and slope into the line equation:

y=mx+b y=mx+b

0=−1×(−2)+b 0=-1\times(-2)+b

0=2+b 0=2+b

We combine like terms:

0+(−2)=b 0+(-2)=b

−2=b -2=b

Therefore, the equation will be:

y=−x−2 y=-x-2

Answer

y=−x−2 y=-x-2

Exercise #3

Which of the following equations corresponds to the function represented in the table?

XY-3-1135246810

Video Solution

Step-by-Step Solution

We will use the formula for finding slope:

m=y2−y1x2−x1 m=\frac{y_2-y_1}{x_2-x_1}

Let's take the points:

(−1,4),(3,8) (-1,4),(3,8)

m=8−43−(−1)= m=\frac{8-4}{3-(-1)}=

8−43+1= \frac{8-4}{3+1}=

44=1 \frac{4}{4}=1

We'll substitute the point and slope into the line equation:

y=mx+b y=mx+b

8=1×3+b 8=1\times3+b

8=3+b 8=3+b

Let's combine like terms:

8−3=b 8-3=b

5=b 5=b

Therefore, the equation will be:

y=x+5 y=x+5

Answer

y=x+5 y=x+5

Exercise #4

Is the given graph a function?

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Video Solution

Answer

No

Exercise #5

Is the given graph a function?

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Video Solution

Answer

No

Question 1

Determine whether the following table represents a function

XY-101247

Question 2

Determine whether the data in the following table represent a constant function

XY012348

Question 3

Is the given graph a function?

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Question 4

Is the given graph a function?

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Question 5

Is the given graph a function?

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Exercise #6

Determine whether the following table represents a function

XY-101247

Video Solution

Answer

No

Exercise #7

Determine whether the data in the following table represent a constant function

XY012348

Video Solution

Answer

No

Exercise #8

Is the given graph a function?

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Video Solution

Answer

Yes

Exercise #9

Is the given graph a function?

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Video Solution

Answer

Yes

Exercise #10

Is the given graph a function?

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Video Solution

Answer

Yes

Question 1

Is the given graph a function?

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Question 2

Determine whether the following table represents a function

XY02468-3-3-3-3-3

Question 3

Determine whether the following table represents a function

XY-226101416111621

Question 4

Determine whether the following table represents a function

XY-1015811

Question 5

Determine whether the following table represents a function

XY-126123

Exercise #11

Is the given graph a function?

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Video Solution

Answer

Yes

Exercise #12

Determine whether the following table represents a function

XY02468-3-3-3-3-3

Video Solution

Answer

Yes

Exercise #13

Determine whether the following table represents a function

XY-226101416111621

Video Solution

Answer

Yes

Exercise #14

Determine whether the following table represents a function

XY-1015811

Video Solution

Answer

Yes

Exercise #15

Determine whether the following table represents a function

XY-126123

Video Solution

Answer

No

Topics learned in later sections

  1. Ways to Represent a Function
  2. Graphical Representation of a Function
  3. Algebraic Representation of a Function
  4. Notation of a Function
  5. Rate of Change of a Function
  6. Variation of a Function
  7. Rate of change represented with steps in the graph of the function
  8. Rate of change of a function represented graphically
  9. Constant Rate of Change
  10. Variable Rate of Change
  11. Rate of Change of a Function Represented by a Table of Values
  12. Functions for Seventh Grade
  13. Increasing and Decreasing Intervals (Functions)
  14. Increasing functions
  15. Decreasing function
  16. Constant Function
  17. Decreasing Interval of a function
  18. Increasing Intervals of a function
  19. Domain of a Function
  20. Indefinite integral
  21. Inputing Values into a Function