Describe and Extend Sequences
Describe the relationship between the terms in the
arithmetic sequence 7, 11, 15, 19, … Then write the
next three terms in the sequence.
7, 11, 15, 19
+4
+4 +4
Each term is found by adding 4 to the previous term.
Continue the pattern to find the next three terms.
19 + 4 = 23 23 + 4 = 27 27 + 4 = 31
Answer: The next three terms are 23, 27, and 31.
Describe the relationship between the terms in the
arithmetic sequence 13, 24, 35, 46, … Then write the
next three terms in the sequence.
A. add 9; 55, 64, 53
B. add 11; 57, 68, 79
C. add 13; 59, 72, 85
D. add 15; 61, 76, 91
1.
2.
3.
4.
A
B
C
D
Describe and Extend Sequences
Describe the relationship between the terms in the
arithmetic sequence 0.1, 0.5, 0.9, 1.3, … Then write
the next three terms in the sequence.
0.1, 0.5, 0.9, 1.3
+0.4 +0.4 +0.4
Each term is found by adding 0.4 to the previous term.
Continue the pattern to find the next three terms.
1.3 + 0.4 = 1.7
1.7 + 0.4 = 2.1
Answer: The next three
terms are
1.7, 2.1, 2.5.
2.1 + 0.4 = 2.5
Animation:
Arithmetic Sequences
Describe the relationship between the terms in the
arithmetic sequence 0.6, 1.5, 2.4, 3.3, … Then write
the next three terms in the sequence.
A. add 0.3; 3.6, 3.9, 4.2
B. add 0.5; 3.8, 4.3, 4.8
C. add 0.8; 4.1, 4.9, 5.7
D. add 0.9; 4.2, 5.1, 6.0
1.
2.
3.
4.
A
B
C
D
EXERCISE Mehmet started a new exercise routine.
The first day, he did 2 sit-ups. Each day after that,
he did 2 more sit-ups than the previous day. If he
continues this pattern, how many sit-ups will he do
on the tenth day?
Make a table to display the sequence.
Each term is 2 times its position number. So, the
expression is 2n.
2n
Write the expression.
2(10) = 20
Replace n with 10.
Answer: So, on the tenth day, Mehmet will do
20 sit-ups.
CONCERTS The first row of a theater has 8 seats.
Each additional row has eight more seats than the
previous row. If this pattern continues, what
algebraic expression can be used to find the number
of seats in the 15th row? How many seats will be in
the 15th row?
A. 8n; 120 seats
B. 8 + n; 23 seats
C. 15n; 120 seats
D. 15 + n; 23 seats
1.
2.
3.
4.
A
B
C
D
End of the Lesson