6th Grade Math Textbook, Fundamentals

Lesson 13-4 for exercise sets. &KDSWHU 

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Identify the domain and range of each relation. Is the relation a function?
Explain your answer.

1.(25, 6), (20, 8), (15, 6), (25, 8), (15, 7) 2.(8, 5), (6, 3), (10, 5), (9, 5), (3, 3)

Write a function rule for the relation.

3.

4.Discuss and Write Explain how you would write a function rule to describe

the relationship of hours to minutes. Write the function rule.

Number of Hours (x) 12345

Amount Earned (y) $15.50 $31 $46.50 $62 $77.50

The table below shows the total number of

cans of food Zoe’s cats ate over 5 days.

The relation is one-to-one. Each x-value is

mapped to exactly one y-value.

The relation is a function.

The table below shows the average

temperature over a five-day period.

The relation is one-to-many.

The x-value 30 is mapped to two y-values.

The relation is not a function.

Avg. Temp. (F) (x) 24 32 30 34 30

Day (y) MTWThF

Number of Days (x) 12345

Cans of Cat Food (y) 3 6 9 12 15

One way to determine whether a relation is a function is to pair or

map each input (x) value with its corresponding output (y) value.

Determine if each relation is a function.

A relates the input (x) values to the corresponding

output (y) values. To write a function rule, compare the output

values to their corresponding input values.

Write a function rule for the relationship between the number of hours

and the number of miles traveled.

Look for a pattern between the input and output values.

Let x= the number of hours. The number of hours is the input value.

Let y= the number of miles traveled. The number of miles is the output value.

Each output value is 55 times the corresponding input value.

Write the function rule as y= 55x.

Number of Hours 12345

Number of Miles 55 110 165 220 275

function rule

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