Name ________________________________________ Date ___________________ Class __________________
Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.
524 Holt McDougal Mathematics
Writing Equations from Tables
Practice and Problem Solving: D
Write an equation to express y in terms of x. The first one is done
for you.
1.
x
0
1
2
3
___________________________
y
2
3
4
5
2.
x
5
10
20
___________________________
y
1
2
4
3.
x
3
4
5
6
___________________________
y
9
12
15
18
4.
x
7
8
9
10
___________________________
y
5
6
7
8
Solve.
5. When George works 8 hours he earns $80. When George works
10 hours he earns $100. When George works 12 hours he earns $120.
Complete the table. Circle the letter of the equation that relates the
dollars George earns, y, to the number of hours he works, x.
Number of hours, x
8
10
12
Dollars earned, y
80
A y x 10 C y 10x
B y x 72
6. When Javier is 2, Arianna is 5. When Javier is 3, Arianna is 6.
When Javier is 8, Arianna will be 11. When Javier is 20, Arianna is 23.
Complete the table. Circle the letter of the equation that relates the age
of Arianna, y, to the age of Javier, x.
Javier’s age, x
2
3
8
20
Arianna’s age, y
5
A y x 2 C y 2x
B y x 3
When Javier is 30 years old, Arianna will be __________________________.
LESSON
12-3
y x 2
Name ________________________________________ Date ___________________ Class __________________
Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.
524 Holt McDougal Mathematics
Writing Equations from Tables
Practice and Problem Solving: A/B
Write an equation to express y in terms of x. Use your equation to
complete the table.
1.
x
1
2
3
4
5
___________________________
y
7
14
21
28
2.
x
2
3
4
5
6
___________________________
y
3
2
1
0
3.
x
20
16
12
8
4
___________________________
y
10
8
6
4
4.
x
7
8
9
10
11
___________________________
y
11
12
13
14
Solve.
5. Henry records how many days he rides his bike and how far he rides
each week. He rides the same distance each time. He rode 18 miles in
3 days, 24 miles in 4 days, and 42 miles in 7 days. Write and solve an
equation to find how far he rides his bike in 10 days.
Number of days, d
3
4
7
10
Number of miles, m
18
Equation relating d and m is ________________________________________.
The number of miles Henry rides his bike in 10 days is _______________.
6. When Cabrini is 6, Nikos is 2. When Cabrini is 10, Nikos will be 6.
When Cabrini is 16, Nikos will be 12.When Cabrini is 21, Nikos will be
17. Write and solve an equation to find Nikos’ age when Cabrini is 40.
Cabrini’s age, x
6
10
16
21
40
Nikos’ age, y
2
Equation relating x and y is _________________________________________.
When Cabrini is 40 years old, Nikos will be __________________________.
LESSON
12-3